If you are having problems with Windows Update component like error messages when opening Windows Update, fails to check for updates when you click "Check for updates", is complaining that Windows Service isn't running even though it is, Windows Update component not responding or hanging, missing updates even though they should be visible etc, there is a way to fix that.STEP 1: MICROSOFT REPAIR TOOL
First stop should always be this tool:http://support.microsoft.com/kb/971058
It's Microsoft's own tool to repair Windows Update. In very simple so i don't expect any problems here.
Go to Windows Update and check if it's working properly after repair attempt.STEP 2: RESETTING WINDOWS UPDATE
If Windows Update is still not working after using the above tool, do the following:
Go to Run command and type in "services.msc" (without quotes) or in other words just get to Services control panel. Look for "Windows Update" service and stop it.
Go to folder:
And delete all it's content (just the content of the folder SoftwareDistribution, not the folder itself). Now go back to the services panel and start Windows Update service again.
Restarting the system is highly recommended in which case Windows Update service will auto-restart by itself.
Go to Windows Update and check if it's working properly after repair attempt.STEP 3: FIX WU UTILITY
If things still don't function properly, try using this tool:http://www.thewindowsclub.com/repair-fix-windows-updates-with-fix-wu-utility
It's called "Fix WU Utility" and it will re-register all important components of the Windows Update.
After repair attempt, go to Windows Update and check if it's working properly.
If you ever had a Windows Update problem and you resolved it in some other way, let me know and i'll add it to the list so others will be able to fix it as well.