Validate Windows here.
Click Start, click Run or hit the Windows Key and the R Key at the same time.
For Windows XP
Copy and paste the .dll's below or type the following commands. Press ENTER after each command. Then click ok.
regsvr32 wuapi.dll
regsvr32 wuaueng.dll
regsvr32 wuaueng1.dll
regsvr32 wucltui.dll
regsvr32 wups.dll
regsvr32 wups2.dll
regsvr32 wuweb.dll
Or you can open notepad, copy and paste the text in between the lines. Save as, Update.cmd
Then double click on it. Answer all seven boxes.
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regsvr32 wuapi.dll
regsvr32 wuaueng.dll
regsvr32 wuaueng1.dll
regsvr32 wucltui.dll
regsvr32 wups.dll
regsvr32 wups2.dll
regsvr32 wuweb.dll
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Attempt to run Windows Update
For Windows Vista
Open notepad, copy and paste the text in between the lines. Save as, VistaUpdate.cmd
Then right click on it and left click run as administrator.
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REGSVR32 WUPS2.DLL /S
REGSVR32 WUPS.DLL /S
REGSVR32 WUAUENG.DLL /S
REGSVR32 WUAPI.DLL /S
REGSVR32 WUCLTUX.DLL /S
REGSVR32 WUWEBV.DLL /S
REGSVR32 JSCRIPT.DLL /S
REGSVR32 MSXML3.DLL /S
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Attempt to run Windows Update
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