Windows

1. Shut down Microsoft Windows Defender by right-clicking on the program icon in the lower-right task bar and clicking the 'Shut down Microsoft Antispyware' option. Do the same for any third party anti-virus programs running. If the error persists, move on to the next step.
2. Click the 'Start' button in the Windows desktop. Click the 'Control Panel' option and then click 'Performance and Maintenance.' Run the 'Disk Cleanup' utility by clicking on the 'Free up Space on Your Hard Disk.'

3. Insert a check mark by the following options on the disk tab: 'Downloaded Program Files,' 'Temporary Internet Files,' 'Temporary Files,' 'Temporary Offline Files' and 'Offline Files.' Delete the files and clear out the cache by clicking the 'OK' button. Start the process by clicking the 'Yes' button.
4. Attempt to install the application again. This time, the installation should be successful.

1. Turn on your computer.
2. Insert your Windows XP install CDs immediately after you turn on your computer.

3. Select the option to boot Windows XP from the CD.
4. Press the “R” key to open the recovery console.
5. Type your computer administrator's password when prompted. If you have not set a password for the administrator user account on Windows, you do not need to enter a password. When you are finished, press enter.
6. Type “chkdisk” (without the quotation marks) at the command prompt and press “Enter.” Wait for the chkdisk program to complete.
7. Remove your Windows XP installation CD and type “exit” at the command prompt. Press “Enter.” This will reboot your computer. It should start normally now.

1. Turn off the computer you want to recover. Restart the computer, pressing the 'F8' key after you start the computer but before Windows starts to load. The computer will display boot options, including safe mode.
2. Use the arrow keys to navigate to and highlight safe mode. Press the 'Enter' key to boot the computer into safe mode.

3. Click the 'Start' button in the safe mode environment, and then click 'Help and Support' to open the Help and Support page.
4. Click 'Performance and Maintenance' on the Help and Support page, then click 'Using System Restore to undo changes.'
5. Click 'Run the System Restore Wizard.' This starts the wizard. Select a restore point from the list of restore points in the wizard, and then click the 'Next' button.
6. Follow the prompts in the wizard. The wizard will roll back the system to a known good states, reversing the damage and restoring the system to a working condition. The computer will restart after roll back to complete the process.

1. Click on the Windows 'Start' button, click on 'All Programs,' then click on the 'Windows Live Mail' shortcut icon. This will open the Windows Live Mail program.
2. Right-click on your email account, on the left, then click on 'Properties.' This will open the account settings window in which you can ascertain the outgoing SMTP server.

3. Click on the 'Servers' tab. Establish the SMTP server, which is located in the text field labelled 'Outgoing mail (SMTP).' Make a note of the SMTP server. For explanation purposes, we shall use the example of 'mail.btinternet.com.'
4. Click on the Windows 'Start' button, type 'Command Prompt' in the search text field, then click on 'Command Prompt,' which should be the first item. This will open a Microsoft Windows Command Prompt, in which you can execute command line applications.
5. Type the following command without quotation marks: 'ping mail.btinternet.com' and press 'Enter' on your keyboard. If you see the message 'Request timed out,' this indicates that you cannot connect to the SMTP server, which typically indicates that the server is down. This is usually the case if the server is undergoing maintenance locally.
6. Wait for a few hours and try to send a message in Windows Live Mail again. Typically, mail server maintenance takes up to 24 hours to be completed.

1. Locate the 404 error. Typically when there is a 404 error message on your website you are not aware of it. An easy way to locate 404 error messages is to sign up for Google Webmaster tools. Get a Google account and register your websites with them. You will have to insert a unique piece of code exactly where they tell you to to validate your site with them. Once that happens Google will regularly look at your sites and tell you if they find any 404 error messages. Alternately, you can ask users to contact you if they come across 404 errors on your site.
2. Determine why there is a 404 error. Once you have located the 404 error you need to determine what caused it. Typically this occurs due to a webpage getting moved or a webpage getting renamed. To see which is the culprit, look at the web address where the 404 error is and compare it to what the web address should be. That will tell you if the problem is a page moving or a page being renamed that is the problem.

3. Change the URL if the page was renamed. If your page was renamed, you will need to change the URL, or web address, of all of the links that were pointing to the old name. You will need to do this on your web page files that you should have stored someplace. Use a web design software, such as Dreamweaver or Frontpage, to make the changes. Then upload the newly changed pages to your hosting company with your normal FTP program to replace the pages that have outdated info.
4. Redirect the page if it has moved. If your webpage was moved then you will need to do a 301 redirect to fix the 404 error. You will need to create a .htaccess file, which you can do with Notepad or with the freeware Notepad program. You will have one line in your file. It will read: 'redirect 301 OLDLOCATION.htm http://www.NEWLOCATION.com'. Be sure to put the actual old location where 'OLDLOCATION.htm' is and put the new location of the page where 'http://www.NEWLOCATION.com' is. Save this file and upload it using your normal FTP program to your domain.
5. Test to see whether the error was resolved. Once you correct the problem that caused the 404 error, you should go to your website to test it out and see if it worked. You may have to click 'refresh' or F5 to see the most updated version of your website.

1. Any time you make changes to an operating system, it's advisable to back up all the files and data on your PC.
2. Once your data is backed up, shut down your computer.

3. Hold the F8 key down while you restart the computer. At the prompt, choose to reboot in safe mode.
4. Once your desktop appears, click the 'Start' menu, and select 'Run.' This will open a command prompt. Type 'regedit' in the command prompt window to open the registry editor.
5. Just in case something goes wrong, back up the registry. In the registry editor's menu, Click 'File' and then 'Export.' Select 'All' under 'Export Range.' Save the file to a folder you can easily find.
6. Now search the editor for the 'wgalogon' folder and delete it. Close out of the registry editor.
7. Use your Windows search to find any 'wga*' files and delete these files.
8. Now reboot your computer in 'normal' mode. You should never see another WGA error message again.

1. Click the 'Start' button and type 'cmd' into the search box. Press the 'Enter' key and a DOS window will open.
2. Type 'msiexec /unregister' and press the 'Enter' key to unregister the Windows Installer engine. Type 'msiexec /regserver' and press 'Enter' to reregister the Windows Installer engine.

3. Type 'msiexec' and press the 'Enter' key to see if there are any error messages. If an error message appears you may need to download and reinstall the Windows Installer. If no errors appear run the update for the program or try again to remove it.
4. Double click the setup file for the program update to run the install.
5. Click the 'Start' button and type 'programs.' Click the option for 'Add or Remove a Program.' Run the uninstall if you are tying to remove a program.

Virus Software
1. Start your Windows computer while tapping on the 'F8' key. Choose 'Safe Mode' from the computer screen's Boot Menu.
2. Click on your anti-spyware software application to launch it.

3. Run a 'Full Scan' of your computer.
4. Click the 'Delete' button on the anti-spyware program to delete the viruses from your computer.
5. Restart the computer.
System Restore
6. Start your Windows computer while tapping on the 'F8' key. Choose 'Safe Mode' from the computer screen's Boot Menu.
7. Click on the 'Start' menu. Click on the 'All Programs' option and then click on the 'Accessories' option.
8. Click the 'System Tools' option and then click on the 'System Restore' option.
9. Follow the prompts on the restore option until you come to a window where you can choose your restore point. Click on the restore point you want and click on the 'Restore' button.
10. Restart your computer after the computer has run the restore software.

1. Press the 'Windows' and 'R' keys simultaneously on your keyboard. This displays a 'Run' box on your screen.
2. Type 'Sysdm.cpl' in the 'Run' box and click the 'OK' button. This opens a 'System Properties' window.

3. Click the 'Advanced' tab on the 'System Properties' window. This tab contains three sections. Each section has a 'Setting' button.
4. Click the 'Setting' button in the 'Startup and Recovery' section at the very bottom. This opens a 'Startup and Recovery' window on your screen.
5. Click to remove the check mark from the box next to 'Automatically restart' under the 'System failure' section. This will prevent the computer from automatically restarting when a blue screen error occurs.
6. Click the 'OK' button at the bottom of the 'Startup and Recovery' tab to save your changes. This brings you back to the 'System Properties' window. Click the 'OK' button on the bottom of the 'System Properties' dialog. You must restart your computer to ensure this change is applied.

1. Insert your Windows Vista or 7 discs in your computer drive and restart your computer.
2. Hold down the 'F8' key on your keyboard while the computer boots up. This will open the 'Advance boot options' screen.

3. Select 'Repair my computer' and press 'Enter.'
4. Select 'Startup Repair' from the list of options and click 'Next.' Startup repair will scan your computer for corrupted and damage files, repair them and boot up your computer.