Run System Restore in Normal Mode
1. Log on to your computer as an administrator.
2. Close any open files and save your data in any open programs.

3. Open 'System Restore' by clicking 'Start' and then typing 'System Restore' (without the quotes) into the search box above the Windows icon or Start button. Click 'System Restore' in the list of options provided. Click 'OK' if prompted, then click 'Next' in the 'System Restore' application window.
4. Select a restore point from the list provided. Windows periodically creates 'restore points' that record your computer' s programs, hardware and registry setting. Choose a date before the day on which you started having problems with rundll23.exe.
5. Click 'Next,' then click 'Finish' to begin System Restore. Windows will automatically restart your computer in order to return it to the restore point you selected in Step 4.
Run System Restore in Safe Mode
6. Boot your computer in 'Safe Mode' by restarting it and holding the 'F8' key as the computer reboots.
7. Open the command prompt by clicking 'Start,' then typing 'cmd' (without quotes) into the search box.
8. Type 'rstrui.exe' (without the quotes) into the command prompt, then press the 'Enter' key. Click 'OK' if prompted. Click 'Next' to proceed to the 'Select Restore Point' panel.
9. Select a restore point from the list provided. Choose a point whose date falls before the day on which you started having problems related to rundll32.exe.
10. Click 'Next,' then click 'Finish' to begin the System Restore process. System Restore will restore your operating system to the earlier configuration.

1. Click 'Start,' 'Control Panel,' 'System and Maintenance' and then 'Administrative Tools.'
2. Double-click 'Services.' Click 'Continue' if prompted.

3. Scroll down and right-click 'Print Spooler' in the Services window. Click 'Properties.'
4. Click the 'General' tab and verify that the box in the center, next to Startup Type, says 'Automatic.' If it doesn't, click the drop-down arrow and change it to 'Automatic.'
5. Click 'Start' farther down the windows in the Service Status section if the service hasn't been started. If it has, you will not be able to press the 'Start' button. Click 'OK.' Your print spooler problems should be fixed.

1. Click the 'Start' menu and choose the 'Run' option. Enter the letters 'CMD' into 'Run' and press 'OK.'
2. Enter the text 'regsrv3,' followed by a space and the line '%systemroot%.' Immediately after the second % symbol, type in '\system32\.' All of this text is the main prefix that you will need to use for each entry.

3. Type the letters 'vbscript.dll' after the first main prefix line and press the 'Enter' key to enter the first command.
4. Enter another line of prefix text followed by 'jscript.dll' to make the second command. Make a third command with the main prefix followed by 'dispex.dll' and press 'Enter.'
5. Type in the fourth command line using the main prefix plus scrobj.dll and press 'Enter.' The fifth command uses the main prefix with the line 'scrrun.dll.'
6. Add the sixth command line with the main prefix and suffix of 'wshext.dll' and press 'Enter.' Type in the final line with the prefix followed by 'wshom.ocx' and press 'Enter.'
7. Restart your computer to allow the script additions to take effect.

1. Click 'Start,' 'Run,' type 'regedit,' and press 'Enter.'
2. Open the folders in the following order: 'HKEY_LOCAL_MACHINE,' 'Software,' 'Microsoft,' 'Internet Explorer,' 'Main,' 'FeatureControl,' 'FEATURE_HTTP_USERNAME_PASSWORD_DISABLE.'

3. Right-click in the right-hand window and select 'New DWORD.' Name this 'iexplore.exe' and enter a value of '0.'
4. Right-click once again in the right-hand window and select 'New DWORD.' Name this 'explorer.exe' and enter a value of '0.'

1. Click the 'Start' button and then click the 'All Programs' button.
2. Click the 'Accessories' tab, and then right-click on the 'Command Prompt' option.

3. Click 'Run as administrator' from the menu, and then enter your administrator password into the field that appears.
4. Type 'sfc /scannow' into the command prompt and press the 'Enter' key.
5. Wait for the scan to complete and then restart your computer to clear the error.

1. Connect to another website using the same browser or application that caused the Error 12029 message. Successfully accessing another website using the same software indicates that the web server being used was unavailable at the time. Web servers occasionally go down when they exceed a maximum number of simultaneous connections. All you can do is wait and try again later.
2. Open a command line window to verify there is no TCP/IP Address problem. On the Desktop, click 'Start,' then 'Run.' In the box type 'cmd.' Next, type 'ipconfig /all,' and a list of connections appears. Check in the IP Address, DHCP and DNS Server headings that there is an address for each one, a number in the following format: 123.456.7.8, or some similar variation. If so, the problem does not lie with the IP Address and you may proceed to step three.However, to fix a missing IP Address, DHCP or DNS Server, type in the command line, 'ipconfig /release,' and then type 'ipconfig /renew' for new addresses. If this still fails to assign new addresses, contact your Internet service provider.

3. Open a command line window to verify that you are not having a DNS Server problem. Click 'Start,' then 'Run,' and type in the box 'cmd.' Next, type 'nslookup website.com,' where website.com is the site you were trying to access when the 12029 error warning popped up. Any result of a nslookup that shows addresses in the following format is okay: 123.456.7.8, or some similar variation. Move to step four.However, if there are no addresses listed, type in the command line, 'ipconfig /release,' and then 'ipconfig /renew' to refresh the address. Try the nslookup again, and if there is still a problem, contact your Internet service provider.
4. Verify that your firewall is not blocking the connection to the web server that your application is trying to access. On the Desktop, click 'Start,' then 'Control Panel,' and click on 'Windows Firewall.' Choose the Exceptions tab and go down the list to find the name of the program you have been using that caused Error 12029. Mark the check-box to add the program. If this still fails to correct the problem, continue to step five.
5. Run a complete virus scan to locate malware and a registry cleaner program to fix any corrupt registry files. These solutions are the last line of defense against an Error 12029 message. As you may now realize, starting with these measures can still end in failure without having fixed the above problems first. After running a virus scan, and registry cleaner, reboot your machine.

1. Start your computer and then press the 'F8' key while it is starting up. This will take you to the 'Advanced Boot Options' menu. Scroll down to the 'Safe Mode' option with the arrow keys on your keyboard.
2. Press the 'Enter' key and wait for the computer to boot into Safe Mode. This should take about 45 seconds to complete. Click the 'Start' button when the computer has booted and then click the 'Run' box.

3. Type 'Regedit' into the run box and press the 'Enter' button. This will start your registry checker tool. Wait for the registry checker tool to complete the scan. This should take about one to five minutes to complete. When the scan has completed, you will be prompted to restart your system.
4. Click the 'Restart' button when prompted to restart your computer. The computer will restart as normal and the Code 19 error will be fixed.

1. Click the 'Start' button and then 'Run.'
2. Type 'regedit' into the box and press 'Enter' to launch the Registry Editor.

3. Click on the 'HKEY_LOCAL_MACHINE' option. Click on the 'Software' icon.
4. Click on the 'Terminal' folder and then the 'Services' option.
5. Click on the 'DWORD' value and increase the number next to 'Time Out.' Make sure that the words 'minutes,' 'hours' or 'day' is next to it to determine the time. You also can choose 'Never' for the time-out to never occur.

Replace NTFS.sys
1. Insert your Windows XP disk and restart the computer. If prompted, press 'Enter' (or any other key) to boot from CD.
2. Type 'R' to enter the Recovery Console.

3. Type '1' and press 'Enter' to select the C:\Windows partition for repair.
4. Type 'cd \windows\system32\drivers' and press 'Enter' to navigate to the folder containing NTFS.sys.
5. Type 'ren ntfs.sys ntfs.old' and press 'Enter' to rename the existing copy of NTFS.sys. This will allow you to create a new copy of the file.
6. Type 'copy d:\i386\ntfs.sys c:\windows\system32\drivers' and press 'Enter' to copy a working version of NTFS.sys to your Windows system folder.
7. Type 'quit' to exit the recovery console.
8. Restart the computer.
Run Microsoft's CHKDSK Utility
9. Insert your Windows installation disk and restart the computer. If prompted, press 'Enter' (or any other key) to boot from CD.
10. Type 'R' to enter the Recovery Console.
11. Type '1' and press 'Enter' to select the C:\Windows partition for repair.
12. Type 'chkdsk /r' and press 'Enter.' Type 'Y' if prompted to unmount the volume.
13. Type 'exit' when CHKDSK has completed and restart the computer.
Perform a Repair Install
14. Insert the Windows XP installation CD and restart the computer. Press 'Enter' (or any other key) if prompted to boot from CD.
15. Press 'Enter' to install Windows.
16. Select your Windows installation (usually C:\Windows) and press 'R' to begin a repair install. A repair installation replaces your Windows system folder with a fresh copy, but it leaves your accounts and files intact.

Windows XP Instructions
1. Click on the 'Start' button and select 'Control Panel.' Double click on 'Performance and Maintenance,' then on 'System,' and click the 'System Restore' tab.
2. Click on the entry labeled 'Restore my computer to an earlier time' on the 'Welcome to System Restore' window and select 'Next.'

3. Choose a date on the list of restore points before the registry error began on the 'Select a Restore Point' page. This list is labeled 'On this list, click a restore point.' Select 'Next.' Select 'Next' again on the confirmation screen. Click the 'OK' button after to confirm the the changes.
Windows Vista Instructions
4. Click on the 'Start' button, then click on the box labeled 'Start Search' and type 'systempropertiesprotection.'
5. Select the tab labeled 'System Protection' and select 'System Restore.'
6. Click on the entry labeled 'Choose a different Restore Point' and select 'Next.' Choose a date for the restore point before the registry error began. Select 'Next.' Select 'Next' once more in the confirmation window.
7. Click 'OK' to confirm the changes made.
Windows 7 Instructions
8. Click on the 'Start' button and type 'System Restore' in the search box. Select 'System Restore' in the list of results.
9. Click on the entry labeled 'Choose a different Restore Point' and select 'Next.' Choose a date for the restore point before the registry error began. Select 'Next.' Select 'Next' once more in the confirmation window.
10. Click the 'OK' button to confirm the the changes.

Method 1: If You Are Able to Run Windows
1. With Windows running, insert the Windows CD or OEM recovery CD into your optical drive.
2. Click the 'Start' button, and then select 'Run.'

3. Type the following command in the 'Run' box (X is the letter of your CD/DVD drive; check your system to find the proper drive number):expand X:\i386\rundll32.ex_ c:\windows\system32\rundll32.exe
4. Reboot the computer. Your corrupted rundll32.exe file has been replaced with the original.
Method 2: If You Are Unable to Run Windows
5. Insert the Windows CD in your computer's optical drive. Reboot the computer.
6. Upon restart, you may be prompted to 'Press any key to boot from CD/DVD.' Follow these instructions to boot from the Windows CD.
7. You will see a 'Welcome to Setup' screen, which presents you with a few options: 'To setup Windows XP now, press ENTER,' and 'To repair a Windows XP installation using Recovery Console, press R.' Even though you are performing a repair installation, do NOT press 'R.' Press 'Enter.'
8. Select the Windows installation you want to repair from the list that appears. Look for C:\WINDOWS 'Microsoft Windows ...'. Then press 'R' to enter repair mode. Press 'F8' to accept the Windows licensing agreement.
9. Windows will reinstall the operating system, overwriting your corrupt or missing rundll32.exe file. Your other data and files will not be erased.

1. Restart your computer to launch the 'Setup' menu.
2. Press 'F7' when you see the following prompt: 'Press F6 if you need to install a third-party SCSI or RAID driver.' This will disable the current ACPI HAL installation.

3. Let Windows install the Standard PC HAL. This process may take a few minutes to complete. Once completed, you will be able to install Windows 2000 with no error messages.

1. Download and install the Windows Installer CleanUp software. This software will get rid of the files corrupting your copy of Microsoft Office. See the 'Resources' section for a download link.
2. Launch the software from the Start menu and select 'Microsoft Office 2003' from the list of programs and then click 'Remove.' The Microsoft Office 2003 software will be completely removed, including all corrupted or lingering install files.

3. Restart your computer and then insert the Microsoft Office 2003 CD. Run the installation program.
4. Restart your computer again and then reinstall the patches.

Windows XP
1. Press the 'Windows' and 'R' keys simultaneously.
2. Type 'Regedit' and press 'Enter.'

3. Navigate to 'HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\PcHealth\ErrorReporting'.
4. Right-click 'DoReport' and select 'Modify.'
5. Change the value from '1' to '0' and restart your computer.
Windows Vista / 7:
6. Press the 'Windows' key and 'R' key simultaneously.
7. Type 'Regedit' and press 'Enter.'
8. Navigate to 'Hkey_users\S-1-5-19\Software\Microsoft\Windows\Windows Error Reporting'
9. Right-click 'Disabled' and change the value from '0' to '1'.
10. Restart your computer.

1. Click 'Start' and then 'Computer.' Right-click 'C' and select 'Properties.'
2. Select the 'Tools' tab and click 'Check now.' Select 'Continue' if the User Account Control prompt displays.

3. Select the 'Automatically Fix File System Errors' option and click 'Start.' Agree to reschedule the check for the next system restart.
4. Reboot your system. Allow the check disk to detect and repair all Error 301 issues.

1. Close programs you aren't using if they are running in the background. You'll immediately free up enough space to save your files. Windows tasks your hard drive when you have programs running or multiple windows open. If this method does not work, attempt a save to an external drive.
2. Turn off your antivirus program and check whether your hard drive space increases. Most antivirus programs take up ample drive space, or they can negatively affect a computer's performance while updating. To see how much space your program uses, open your Control Panel. Acess your 'Add/Remove Programs' category and review the list of programs. Each program name includes the amount of allocated hard drive disk space. If the program is hogging your drive, consider purchasing an antivirus product, such as AVG, that utilizes less space.

3. Remove any spyware or adware by downloading removal software for free from a reputable website such as CastleCops. Use the 'Hijack This' application to create a snapshot of your system files for review by a technician. The pro will tell you how to hunt and remove any harmful files.
4. Empty your Recycle Bin. Remove programs and delete files that you no longer use, including temporary files and Internet cookies. Remove programs in the 'Add/Remove Programs' list.
5. Use ScanDisk to locate and fix any hard drive errors. If you cannot find ScanDisk, run a search from your Windows Help screen.
6. Defragment your hard drive. Defragmenting frees up hard drive disk space by bringing all of your data together in one place on the hard drive.
7. Buy a bigger internal or external hard drive if all else fails. Many inexpensive internal hard drives are available and are easy to swap. Match the new internal hard drive physical size to the existing one, so that it fits in your hard drive dock. Check your manufacturer's list of recommended drives. Most inexpensive external hard drives attach easily to computers with USB connectors.

Fixing with Anti-Virus
1. Shut down the computer.
2. Restart the computer, but press F8 repeatedly to bring up a menu asking how you'd like to boot the computer. Select 'Safe Mode.'

3. Open the anti-virus software on your computer. If you don't currently have one, you can download a free one from the link provided below (see Resources).
4. Perform a full system scan. Being in safe mode will allow the scan to detect and remove more infected objects.
5. Click 'Remove' once the scan is complete.
Fixing the Registry
6. Download the RegCure software through the second link in Resources. This software will scan the computer for all possible registry errors and issues.
7. Double-click the RegCure download icon, then follow the steps to complete the installation.
8. Open RegCure by double-clicking the new desktop icon.
9. Click 'Scan', leaving all of the scan options selected.
10. Click 'Remove' once the scan is complete. Once this step had been performed, there should no longer be any more lsass.exe system errors

1. Place the Mac OS X Install DVD into your computer and select 'Restart' from the Apple menu. Hold down the 'C' key on the keyboard when you hear the chime.
2. Click 'Continue' until you get to the menu screen. Select 'Utilities' or 'Disk Utility' from the menu.

3. Select your Mac's hard drive and start-up disk. Hold down the 'Command' key to select more than one disk.
4. Click 'Repair Disk.'

WinRar Installation
1. Go to the WinRAR website and click on 'Save File' in the automated pop-up to accept the WinRar setup file download.
2. Double-click the saved file and click on 'Yes' to confirm execution.

3. Follow the step-by-step instructions of the Installation Wizard to install the WinRar archiver to your PC.
Registry Fix Installation
4. Go to the Registry Fix Installation website, and click on 'Download WindowsLicense.rar' icon on top of the page.
5. Click on 'Save File' in the pop-up window to accept the RAR file download.
6. Double-click the archived file once the download is complete, which will automatically launch WinRar and decompress the file. Decompression will result in a new folder with several files inside.
7. Double-click the folder and then the file with .reg extension, which is the registry fix. Click on 'Yes' in the pop-up window to confirm installation.
8. Restart your computer. The WGA notification should be gone, and your operating system will pass all of the future validation tests.

1. Click the Windows 'Start' button, type 'regedit' in the Search field and point to 'regedit.exe.'
2. Press 'Ctrl-Shift-Enter' to launch the Registry Editor with administrative credentials.

3. Navigate through 'HKEY_LOCAL_MACHINE | SYSTEM | CurrentControlSet | Control | Class | {4D36E965-E325-11CE-BFC1-08002BE10318}.'
4. Right-click 'LowerFilters' from the right pane and select 'Delete' from the context menu.
5. Click 'Yes,' when prompted, to remove the value from the registry. Right-click 'UpperFilters.'
6. Click 'Delete' and select 'Yes' to remove the value. Restart the computer to resolve the error code.