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When I try and open the Windows Update control panel it either never displays, or displays a partially rendered Windows Update window and never seems to "unfreeze".

I've tried cycling the Windows Update service (which seems to stall during the Stop process until I kill it using Task Manager), but that doesn't seem to help.

I've also rebooted several times.

This started happening after installing today's (4/12/2011) patches. I hadn't installed patches in several months, so it could have been one of many different patches that caused it.

Short of uninstalling the patches I just installed, are there any other debugging tips?

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Is there anything in the event logs? – Dave Wise Apr 12 '11 at 23:03
Another suggestion would be to download and apply SP1. – Vick Vega Apr 12 '11 at 23:12

Well I would try and back the patches out. You say you don't want to do this so much so you might want to download and run MBSA, Microsoft Baseline Security Analyzer. This tool can tell you if you have partially installed patches, misconfiguration, and also let you download patches via direct links in the application. I have used it a few times to get stuborn machines back on track.

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