In IE, choose Tools>Windows update and check the installation history. The first page should contain quite a lot of the same failures. Please tell which update it is.
Then check c:\windows\kbxxx.log (xxx is the 6 digit number) and tell if it gives any reason for the failure.
Kees
For the last few days everytime I go to shut off my computer I get a message that windows has an important update. I did click on it to do the update and when I went to sign off the next time I again got the message so clicked to update again. It tells me that the update was done and my computer shuts off.
5 times yesterday I tried it and everytime I go to shut off the computer the message is there that Windows needs to update. Can anybody tell me why I keep getting this message when I already did the update?
I even disabled all parts of my Avast AntiVirus before I shut it down in case that was causing the problem. Did the Windows update, computer shuts down, started it up again, enabled my Avast AntiVirus and when I went to shut it off the message was there again. Any help will be greatly appreciated. Thanks in advance.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic