How can I solve error code: WindowsUpdate_00000646
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M$3 Answers
Step 1: Reset Windows Update components
Use the “Fix it” provided in the link below
How do I reset Windows Update components?
http://support.microsoft.com/kb/971058
Step 2: Disable the antivirus program and enable it back once the troubleshooting is done.
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M$
http://www.topckit.com
http://windows.microsoft.com/en-US/windows-vista/products/home
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Go in Control Panel/User Accounts/Turn User Account Control on or off
(you'll be turning it off at this point) Restart your computer. Once
Windows is back up, install the updates. No problem. Once you're done
installing, turn UAC back on. This is simpler. You can do this in Windows
Security Update.
Another solution is to take a look at each update and try to install them one at a time. Copy the KB numbers from the update and search for these updates on windows.com. Download each of these updates from Windows.com and this will hopefully work.
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