1. Click the 'Start' menu, then click the 'Control Panel' option.
2. Click the 'Windows Firewall' option in the menu.

3. Click 'Allow a program or feature through Windows Firewall,' then click 'Add' in the menu.
4. Select your 'MySQL' program from the menu and click the 'OK' button.
5. Reopen MySQL to work without the error.

System Restore
1. Go to 'Start,' and point to 'All Programs,' point to 'Accessories,' point to 'System Tools,' and then click on 'System Restore.'
2. In the 'System Restore' wizard that opens up, select the 'Restore my computer to earlier time' option and then click 'Next.'

3. Select a 'Restore point' to restore your computer to and then click 'Next.'
4. In the 'Confirm restore point selection,' click 'Next' to complete System Restore.
Recovery Console
5. Insert the Windows XP Setup CD into the CD drive, and then restart your computer.
6. When you see the 'Welcome to Setup' screen, press 'R' to start the Recovery Console.
7. If you have more than one operating system installed on your computer, select Windows XP from the displayed list.
8. In the Recovery Console, type the following lines one by one and then press Enter. Here we are assuming that Windows XP is installed in the 'D' drive. If Windows XP is installed in another drive on your computer, you replace 'D' with that letter.md tmp
copy D:\windows\system32\config\system c:\windows\tmp\system.bak
copy D:\windows\system32\config\software c:\windows\tmp\software.bak
copy D:\windows\system32\config\sam c:\windows\tmp\sam.bak
copy D:\windows\system32\config\security c:\windows\tmp\security.bak
copy D:\windows\system32\config\default c:\windows\tmp\default.bakdelete D:\windows\system32\config\system
delete D:\windows\system32\config\software
delete D:\windows\system32\config\sam
delete D:\windows\system32\config\security
delete D:\windows\system32\config\defaultcopy D:\windows\repair\system c:\windows\system32\config\system
copy D:\windows\repair\software c:\windows\system32\config\software
copy D:\windows\repair\sam c:\windows\system32\config\sam
copy D:\windows\repair\security c:\windows\system32\config\security
copy D:\windows\repair\default c:\windows\system32\config\default
9. Type 'exit' (without the quotation marks) to quit the Recovery Console, and then restart your computer.

1. Start up your computer.
2. Immediately insert your Windows XP install CD. As the computer boots, a boot menu will appear (if you did not insert the CD in time, you will not see the menu; in this event, simply reboot the computer again).

3. Select the option to boot from the CD. A setup screen will soon appear.
4. Press the 'R' button on your keyboard at the setup screen in order to open the repair console.
5. Type in the administrator account's login password if you are prompted to do so. If there is no login password, simply leave the password slot blank and continue. After this step, a command prompt will appear.
6. Type in 'chkdsk' (minus the quotation marks) and press 'Enter.' Allow the operation to run.
7. Type 'Exit' (again, minus the quotation marks) when the operation is complete, and press 'Enter.' If your computer boots correctly, great! If not, move on to the next step.
8. Reboot and repeat Steps 3 through 5.
9. Type 'fixboot' (minus the quotation marks) and press 'Enter.' Once it is complete, repeat Steps 7 to 8.
10. Contact Windows Support if the issue is not resolved. You might need to reinstall your operating system.

1. Turn on the computer giving you the error. Log in as an administrator.
2. Click Start and navigate to 'All Programs.' Expand the 'Accessories' folder and right-click 'Command Prompt.' Select 'Run as Administrator'

3. Type 'netsh interface tcp set global autotuninglevel=disabled' into the 'Command Prompt' window and press 'Enter.'
4. Restart the computer to finalize the settings.

1. Remove any USB flash drives from your computer and try installing Windows XP again.
2. Try removing from your computer some of the old hardware, such as modems, hard drives, floppy drives and USB peripherals, and repeat the Windows XP installation to see if you still get a blue screen. Most times, your computer blue screens because of compatibility issues during a Windows XP installation. Get hardware that claims it has XP compatibility. Vista and Windows 7 compatible hardware also works.

3. Restart your computer and start the XP installation normally until it tells you that “Setup is inspecting your computer's hardware configuration” message. Press 'F5' when you see this. Select the proper abstraction layer for your computer, depending on the processors your computer has. A dual core computer counts as a dual processor computer, and so on.

Reinstall the CD or DVD-Rom Drive
1. Open the 'Start' menu and choose 'Control Panel.' Select 'System and Maintenance' from the 'Control Panel' menu and then click 'Device Manager.'
2. Click 'DVD/CD-ROM drives' in the device list to expand the section. All of the DVD/CD-ROM drives that are installed on the computer appear in the drive list.

3. Right-click the CD or DVD-Rom drive that caused the code 39 error. The name of the drive that is causing the error is listed in the error message that appears on the screen when you attempt to play a disc.
4. Select 'Uninstall' from the menu that appears. The device uninstalls from the system and a message appears stating that the drive has been successfully uninstalled.
5. Restart the computer by going to 'Start' and 'Restart.' When the computer boots up, the computer recognizes the CD or DVD-Rom drive as a new device and reinstalls the drive with the appropriate drivers for the operating system.
Manually Add Drivers to the Registry
6. Access the computer's registry editor by going to 'Start>Accessories>Run' and typing 'regedit' into the run box. Press 'Enter' and the registry editor launches on the screen.
7. Go to the CD or DVD-Rom drive components of the registry. To get to the CD or DVD-Rom components, click the 'HKEY_LOCAL_MACHINE' folder, then 'SYSTEM>CurrentControlSet>Control>Class.'
8. Click the key in the 'Class' folder that is labeled '4D36E965-E325-11CE-BFC1-08002BE10318.' The right-hand pane displays the information concerning that key.
9. Find 'UpperFilters' in the list in the right pane. Right-click the 'UpperFilters' entry and select 'Delete' from the list. Click 'Yes' to confirm that you want to delete the key. Scroll to the 'LowerFilters' entry in the right pane. Right-click and choose 'Delete,' then confirm to delete the entry.
10. Reboot the computer by going to 'Start>Restart.' The drivers for the CD or DVD-Rom drive reinstall upon startup.

1. Reset your Internet Explorer web browser. This generally solves most plugin errors. To reset your web browser click the 'Tools' button and click 'Internet Options.'
2. Click the 'Advanced' tab and click 'Reset.' Select the 'Delete personal settings' check-box if you want to delete browsing history.

3. Click 'Reset' again in the 'Reset Internet Explorer Settings' box. Click 'Close' when the resetting process is complete. Close and relaunch your web browser. Move to the next step if you are still running into plug-in errors.
4. Enable the ActiveX and plug-in settings. To do so, click the 'Tools' button on your web browser and click 'Internet Options.'
5. Click the 'Security' tab and click 'Custom Level' to open the security settings window. Scroll down and select the 'Run ActiveX controls and plug-ins' radio button if it has not already been selected. Click 'OK' to save the changes and 'OK' again to close the Internet Options console. Restart your web browser.
6. Uninstall and reinstall the plug in if you are still running into errors. To do so, click the Windows 'Start' button and click the 'Control Panel.' Double-click 'Add or Remove Programs' to open the programs window if you are a Windows XP user. Click 'Program and Features' and click 'Uninstall a Program' to launch the programs window if you are a Windows Vista user.
7. Scroll through the programs window and click the plug-in (e.g. Adobe Flash player) running into errors. Click 'Remove/Uninstall' and uninstall it from your computer. Navigate back to the website you originally downloaded the plug-in from and download it again. Restart your web browser once the download is complete.

1. Reboot your computer and insert your Windows XP disk.
2. Press any key when shown the prompt 'Press any key to boot from CD.'

3. Press the 'R' key on your keyboard when asked whether you want to install or repair Windows.
4. Press '1' and then press 'Enter.' This will allow you to log into Windows.
5. Enter your administrator password if you have one.
6. Type the following commands at the command prompt:
'copy e:\i386\ntldr c:\'
'copy e:\i386\ntdetect.com c:\'

1. Insert the Windows XP setup CD in the CD drive of your computer, and then restart your computer.
2. Press “R” on your keyboard when you see the Windows XP 'Welcome to Setup' screen. This will start the Windows XP recovery console. If you are asked to enter the administrator password, type it and press “Enter.”

3. Type the following commands one by one, without quotes, at the command prompt, and then press “Enter.”
“EXPAND drive_letter1:\i386\user32.dll_ drive_letter2\windows\system32”
“EXPAND drive_letter1:\i386\userinit.ex_ drive_letter2\windows\system32”
Replace drive_letter1 here with the CD drive letter of your computer in which the Windows XP setup CD is present (for example, E:), and drive_letter2 here with the letter of the drive in which Windows XP is installed on your computer (for example, D:).

1. Click 'Start' and type 'cmd' in the 'Search' box.
2. Right-click 'cmd' and press 'Run as administrator.'

3. Type 'secedit /configure /cfg C:\Windows\inf\defltbase.inf /db defltbase.sdb /verbose' at the DOS prompt.
4. Press 'Enter' to reset and repair file permission security settings.

1. Click 'Ctrl Alt Delete' on your computer's keyboard to open the Task Manager window. Click the 'Processes' tab and search for a rundll32.exe program. If one is running and appears to be accessing a lot of your system's resources, click 'End Process' as it is likely a malicious program and not a true Windows program.
2. Run software to seek out, detain and remove viruses, malware, spyware and adware. Often these malicious programs corrupt DLL files or cause them to be deleted or moved and, as mentioned, some rundll32.exe programs may in fact be viruses on your system.

3. Reboot your computer to update any changes you may have made recently to your files and programs. Many programs and applications require a reboot for successful installation.
4. Uninstall a recently installed or changed program or application and then reinstall it using the default settings. An installed program may not have loaded properly, an installation via the Internet may have been interrupted enough to create errors or the program may have a bug. If you uninstalled a program and see a rundll32.exe error, reinstall the program and then uninstall once more.
5. Retain the services of a Microsoft certified technician, if all else fails, to review and fix your system's Registry.

Repairing Windows
1. Insert the Windows install disk for your version of Windows and reboot the PC. With the computer unable to find the operating system on the hard drive, it may skip automatically to the next possible boot device, which should be the CD or DVD-ROM drive. Some systems may be configured to boot to that source first, and others may not be configured to roll over to the next device at all. When in doubt, there should be an option to select boot device when the computer is first powered on (the F12 key on most Dell computers) and you can boot straight to the optical drive from there.
2. Press any key when prompted to boot to the install disk, then follow the on-screen instructions. You'll want to try to perform a repair on the existing Windows install, which you will get to by first selecting a new install of Windows.

3. Select to install a new operating system, and the install package will look to see if Windows is already installed. If it finds the existing install, the installer should give you a chance to perform a repair of what's currently on the hard drive, replacing corrupted files with clean ones from the install disk.
4. If the Windows installer does not detect an existing Windows install on the hard drive, then the hard drive itself may be at fault.
5. Replace the hard drive and repeat the first few steps to install Windows from scratch. The original hard drive is likely corrupted or otherwise broken, and may not be recoverable at all, outside of an expensive, third-party data retrieval service.

1. Check if you are running the latest MSN Messenger version by visiting the Windows Live Messenger page (see Resources). As of April 2011 the latest MSN Messenger version is Windows Live Messenger 2011. If you need to update your Messenger, click the 'Download Now' tab and install the new version. If you are using the latest version proceed with the following steps.
2. Close your MSN Messenger window, right-click on its icon displayed in your taskbar and select 'Exit.' Thereafter access you computer's run window by pressing the key on your keyboard with the Windows logo and then pressing 'r.'

3. Type 'cmd' in the text box displayed on the run window and then click 'OK.' The Command Prompt window will now be displayed on your screen.
4. Type the following commands on the Command Prompt window. Press the 'Enter' key on your keyboard after typing each command. Type 'cd\' and press 'Enter,' type 'cd %appdata%\Microsoft' and press 'Enter,' type ''cd 'msn messenger'' press 'Enter,' and finish by typing 'del /s listcache.dat' and pressing 'Enter.' Once you are finished typing these commands, the cache files for your Messenger will be deleted.
5. Click on the MSN Messenger icon displayed in your taskbar to launch it and then log in as usual.

1. Open 'My Computer,' right-click on your 'C' drive and click 'Properties.' From the window that pops up, click 'Tools.'
2. Click 'Check Now' under the 'Error-checking' heading. Check the boxes next to 'Automatically fix file system errors' and 'Scan for and attempt recovery of bad sectors.' This process may take some time and it is recommended that you close any other running applications or windows while this scan takes place.

3. Restart your computer once the scan is complete. To ensure the removal of any errors on your hard drive, repeat the scan to see if the errors have been fixed. If you want to view any errors without the computer fixing them automatically, uncheck the box next to 'Automatically fix file system errors.' The computer will scan your hard drive again, but will only report the errors instead of repairing them. (This is useful if you are attempting to contact technical support and want to see the exact error.)

1. Click the 'Start' button. From the Start menu, select 'Control Panel.'.
2. Double-click 'Automatic Updates' in the Control Panel. This will bring you to the Automatic Updates screen.

3. Click the check box next to 'Automatic.' Choose the date and time you wish for your computer to automatically download and install your updates and press 'OK.' Your computer will now download and install all updates automatically, circumventing the 0x800704DD error.

1. Click the 'Start' button in the Windows desktop to open the 'Start' menu.
2. Click the 'Run' icon and type 'regedit' (without quotes) into the 'Run' text field and click the 'OK' button. The Microsoft Registry Editor will open.

3. Go to the left-side pane of the registry and locate the 'HKEY_LOCAL_MACHINE' entry. Open the entry.
4. Open these folders in the following order: 'Microsoft'>'Windows'>'NT'>'CurrentVersion'>'AppCompatFlags'>'Layers.'
5. Locate any keys that contain the 'Relex.exe.' path in them and right-click, then select 'Delete.' Close the editor afterward.

1. Navigate to Norton's update center. Click the yellow 'Update Me Now' button. This button will scan your existing installations of Norton software and take you through the update process. Follow all on-screen instructions provided. You may need to restart your computer.If the ccsvchst.exe errors cease after Norton has been updated, you do not need to take any further steps.
2. Uninstall Norton Antivirus from your computer. Open the Start menu and click on 'Control Panel.' Click 'Programs.' Highlight the Norton product from the program list displayed. Click 'Uninstall.' Follow any on-screen instructions as prompted.

3. Run your registry cleaner software. This will erase any last traces of uninstalled software from your system. If the errors cease, reinstall the program using the latest version available on the Norton website. If the errors continue after this step has been taken, there is likely a spyware program or virus posing as ccsvchst.exe. Continue to step 4.
4. Launch your anti-spyware software. Perform a full scan of your hard drive. Follow the on-screen instructions to quarantine and remove any malicious software that is detected. Once your hard drive is clean, you may safely reinstall Norton.

1. Understand the causes of missing NTLDR errors. One of the most common reasons for an NTLDR-based startup error occurs when Windows XP attempts to start from a hard drive that isn't set up to launch Windows XP. For example, you may encounter an NTLDR error if you attempt to boot from an improperly formatted Windows XP startup disk. These errors may also be caused by corrupt, missing hard drive data and loose hardware cables.
2. Click the Start menu button in the lower left-hand corner of the Windows XP screen. Select 'Restart' to reboot the PC.

3. Check that the computer's optical media drives are empty. A major cause of NTLDR errors is when a non-startup disk is in the CD slot and Windows XP attempts to launch from it.
4. Insert the Windows XP installation disk. Restart the computer. Press any key on your keyboard during the startup process to launch the installation setup screen. Press the 'R' key on your keyboard when the Windows XP Setup screen appears. This launches the Windows XP Recovery Console program and a screen in which you can type command prompts.
5. Type 'copy d:\i386\ntldr c:\' (without quotation marks) in the command prompt window, then press the Enter key on your keyboard. Type 'copy d:\i386\ntdetect.com c:\' (without quotation marks), and press the Enter key again. The Windows XP Setup software will detect and replace any NTLDR software files that may be missing or corrupt.
6. Press the 'Y' key on your keyboard if the Windows XP Setup software asks for permission to rewrite and replace the files in Step 5.
7. Eject the Windows XP installation disk by pressing the Eject button on the front of your computer. Type 'exit' (without quotation marks) in the command prompt window to close the Setup software, then press the Enter key on your keyboard to restart the PC. Windows XP will now launch without missing NTLDR errors.

1. Restart your computer. Software conflicts may arise during day-to-day usage that causes a network error, thus provoking a NAT error. Restarting clears the system cache and may fix this error.
2. Close any networking devices and programs that use a heavy data connection. For example, bitTorrent clients such as Vuze or Azureus are notoriously common causes of NAT errors. If shutting down the bitTorrent file sharing software and similar network-intensive programs does not fix your NAT error, continue to Step 3.

3. Open your firewall software's preferences options. Check the level of security at which the firewall is currently operating. Some firewalls set a default security level that is too stringent and prevents legitimate software from accessing the network, thus causing NAT errors. Check that the firewall is allowing legitimate traffic and has not closed all of your computer's ports.
4. Reset your Internet or local network router. Use a paper clip or pen point to press the recessed reset button on the back of the device. Hold down the reset button for 10 to 20 seconds until all of the lights on the front of the router flash. Release the reset button and wait for your computer to reconnect to the network.

1. Click 'Start' and then 'Control Panel' and go to 'User Accounts.' See if you have administrative privileges. If you do not, restart the system and log-in as administrator.
2. Check whether you have the latest version of Windows installer on your system. To find the version of Windows installer go to the 'System32' folder in the Windows directory and find the file 'MSI.DLL'. Right-click on it and go to 'Properties' and check the version. If the version is older than 3, you need to update the installer.

3. Download the latest version of Windows installer from microsoft.com and install using default options. A link to the download is in the Resources section of this article. Restart your system and log in as administrator.
4. Go back to the 'System32' folder and check whether the 'MSI.DLL' file is updated to the latest version.
5. Install the desired software with administrative rights. If Error 1406 still occurs, the problem is due to a bug in the software. Download a different version of the software and proceed with the installation.

1. Click \'Start,\' then click \'Run.\'
2. Type \'regedit\' in the \'Open\' dialog box, then click \'OK.\'

3. Double click the \'HKEY_LOCAL_MACHINE\' folder.
4. Continue clicking the appropriate folder sub-directories until you find the following folder: \'HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\User Shell Folders.\'
5. Double click \'Common Administrative Tools\' and then type in \'%ALLUSERSPROFILE%\\Start Menu\\Programs\\Administrative Tools\' in the \'Value data\' box.
6. Go to the \'File\' menu and click \'Exit\' to quit out of the Registry Editor.
7. Restart your computer to activate the changes made to your computer system.

1. Double click the file in iTunes that you're trying to play. The 'original file could not be found' error message will appear. Click the 'Locate' button.
2. Click one time on the audio or video file on your computer in the 'Locate' window now on screen. This window operates identically to any regular Windows Explorer file browsing window. Click around the directories on your hard drive until you have located the file in question.

3. Click 'Open.' iTunes will update the location of the file in its own memory to reflect its current location. The file will then play as normal in iTunes.

1. Click 'Start,' type 'Disk Cleanup' in the 'Search' box, and press 'Enter.'
2. Click the 'C' partition and press 'OK.'

3. Check the box next to the 'Memory Dump Files.'
4. Press 'OK' and click 'Delete Files.'

System Restore for Windows XP
1. Click 'Start' and then select 'Control Panel.' Next, press 'Performance and Maintenance.'
2. Select 'System Restore.'

3. Select 'Restore my computer to an earlier time' and then press 'Next.'
4. Choose a restore point from the available list. The dates of the restore points are in bold. The default selection is the date of the last 'System Checkpoint' or manual restore point.
5. Press 'Next.' When the confirmation screen appears, press 'Next' again.
6. Press 'OK' to confirm the restoration after the computer restarts and you have logged on.
System Restore for Vista
7. Click 'Start' represented by the Windows icon.
8. Go to the 'Start Search' box and type 'systempropertiesprotection'. When finished, press 'Enter.'
9. Go to the System Protection tab and press 'System Restore.'
10. Select 'Choose a different Restore Point' and then press 'Next.'
11. Select the restore point from the available list and then press 'Next.' When the confirmation screen appears, press 'Next' again.
12. Press 'OK' to confirm the restoration after the computer restarts and you have logged on.

1. Confirm that Windows XP is not running in Safe Mode, as this prevents the Windows Installer Service from operating. If you aren't sure, click the 'Start' button and then click 'Turn Off Computer.' Click the 'Restart' button and allow Windows to restart normally.
2. Press the 'Windows' and 'R' keys simultaneously. Type 'msiexec.exe /unregister' without quotation marks in the 'Run' dialog box and press 'Enter.' The mouse cursor changes to an hourglass. After a moment, full control of the computer returns.

3. Open the 'Run' dialog box again. Type 'msiexec /regserver' in the box and press 'Enter.' The cursor changes to an hourglass again, then changes back to normal.
4. Attempt to install the program that is not working properly again. If the program installs successfully, stop here. If it does not, continue to the next step.
5. Open the 'Run' dialog box. Type 'regedit' in the box and press 'Enter.' The registry editor appears.
6. Click the 'HKEY_CLASSES_ROOT' folder on the left side of the window.
7. Click the 'Edit' drop-down menu at the top of the window, and then click 'Permissions.'
8. Click the 'Add' button. In the text box at the bottom of the window, type the word 'SYSTEM' and click 'OK.'
9. Click the word 'System' in the 'Permissions' window. Place a check in the box labeled 'Full Control' under the 'Allow' column, and then click 'OK.'
10. Close the registry editor and restart Windows. You should now be able to install the software.

Disable System Restore
1. Click on the 'Start' button, then right-click 'My Computer.'
2. Select 'Properties.'

3. Click on the 'System Restore' tab in the 'System Properties' window.
4. Click the check box next to 'Turn off System Restore.'
5. Click 'Yes' to confirm.
Update Antivirus Software and Scan Computer
6. Update your antivirus software with the latest version by opening the software and clicking to your 'Update Manager' or to an aptly named 'Update' function.
7. Click on 'Update Now.'
8. Reboot the computer. Press the F8 key after the computer restarts but prior to the appearance of the Windows splash screen.
9. Choose to start Windows in 'Safe Mode.' Press the 'Enter' key.
10. Go to the 'Scan' function of your antivirus software. Click on 'Perform Full System Scan.'
11. Quarantine or eliminate any infected files the scanner finds.
Remove Registry Entries
12. Click on the 'Start' button, then 'Run.'
13. Type 'regedit.' Press the 'Enter' key.
14. Click on 'Edit' in the toolbar. Select 'Find.'
15. Enter each key listed in the Symantec link under 'References.' Highlight the entry, if it is not already highlighted, then right-click on the entry. Select 'Delete.'
16. Click on 'File,' then 'Exit' after you've deleted all keys.
17. Restart the computer. If the 'Critical System Error' message does not reappear, you may re-enable 'System Restore.' Follow the instructions in Section 1, and uncheck the box next to 'Turn off System Restore.'