General Windows Update Troubleshooting

Try a Clean Boot and try updating there might be a service that you are running  that is stopping your computer from updating. Follow the link for Clean Boot Mode: http://support.microsoft.com/kb/331796

If there is still an error updating, then there is an update that is corrupt and it keeps trying to update each time. Sometime the file or update can be fix if it is not corrupted bad. I suggest that you BACK-UP all your data . Here are some things you can try CHECKDISK, SFC SCAN and ChEKSUR.

HOW TO CHECK  DISK:
http://windowshelp.microsoft.com/Windows/en-US/Help/bc1393cf-9f9c-79c7-0f91-9337c2c41f811033.mspx

SFC SCAN: http://support.microsoft.com/kb/947595

CHECKSUR download: http://www.microsoft.com/downloads/details.aspx?FamilyID=2889489c-ee87-4607-8aa5-812e8078ab27&DisplayLang=en#Overview

The following outlines how to stop services pertaining to Windows Update, rename system folders, register related DLL files, and then restart the previously mentioned services. This troubleshooting generally applies to all Windows Update related issues.

Stopping services pertaining to Windows Update

1.     Click Start, click All Programs, click Accessories, right-click Command Prompt, and select Run as Administrator.
2.     If you receive a notification from User Account Control simply click Continue.
3.     At the command prompt, type the following, commands and then press ENTER after each command.
        net stop wuauserv
        net stop bits
        net stop cryptsvc
4.     Please do not close the Command Prompt window.

Renaming folders pertaining to Windows Update
1.     At the command prompt, type the following commands, and then press Enter after each command:
2.     ren %systemroot%\System32\Catroot2 Catroot2.old
3.     ren %systemroot%\SoftwareDistribution SoftwareDistribution.old
4.     Please do not close the Command Prompt window.

Registering DLL’s pertaining to Windows Update

1.     Please copy and paste the following text into a new Notepad document, and save the file as WindowsUpdate.BAT
2.     If saved correctly the icon will change from a Notepad file to BAT file which has two blue cogs as its icon.
            -or-
3.     You can manually type each command at the command prompt:

regsvr32 c:\windows\system32\vbscript.dll /s
regsvr32 c:\windows\system32\mshtml.dll /s
regsvr32 c:\windows\system32\msjava.dll /s
regsvr32 c:\windows\system32\jscript.dll /s
regsvr32 c:\windows\system32\msxml.dll /s
regsvr32 c:\windows\system32\actxprxy.dll /s
regsvr32 c:\windows\system32\shdocvw.dll /s
regsvr32 wuapi.dll /s
regsvr32 wuaueng1.dll /s
regsvr32 wuaueng.dll /s
regsvr32 wucltui.dll /s
regsvr32 wups2.dll /s
regsvr32 wups.dll /s
regsvr32 wuweb.dll /s
regsvr32 Softpub.dll /s
regsvr32 Mssip32.dll /s
regsvr32 Initpki.dll /s
regsvr32 softpub.dll /s
regsvr32 wintrust.dll /s
regsvr32 initpki.dll /s
regsvr32 dssenh.dll /s
regsvr32 rsaenh.dll /s
regsvr32 gpkcsp.dll /s
regsvr32 sccbase.dll /s
regsvr32 slbcsp.dll /s
regsvr32 cryptdlg.dll /s
regsvr32 Urlmon.dll /s
regsvr32 Shdocvw.dll /s
regsvr32 Msjava.dll /s
regsvr32 Actxprxy.dll /s
regsvr32 Oleaut32.dll /s
regsvr32 Mshtml.dll /s
regsvr32 msxml.dll /s
regsvr32 msxml2.dll /s
regsvr32 msxml3.dll /s
regsvr32 Browseui.dll /s
regsvr32 shell32.dll /s
regsvr32 wuapi.dll /s
regsvr32 wuaueng.dll /s
regsvr32 wuaueng1.dll /s
regsvr32 wucltui.dll /s
regsvr32 wups.dll /s
regsvr32 wuweb.dll /s
regsvr32 jscript.dll /s
regsvr32 atl.dll /s
regsvr32 Mssip32.dll /s

Restarting services pertaining to Windows Update

1.     Click Start, click All Programs, click Accessories, right-click Command Prompt, and select Run as Administrator.
2.     If you receive a notification from User Account Control simply click Continue.
3.     At the command prompt, type the following, commands and then press ENTER after each command.
        net start wuauserv
        net start bits
        net start cryptsvc
        exit

4.     Now please check for updates using Windows Update to see if the issue has been resolved.