An update has been installed on my desktop pc and now it won't let me even get in the log on screen. Help, please!

My mother the automatic updates on the pc and something has updated this morning when my mother was shut down the pc.  I turned on the pc and it was a black screen and it looked like he was running through a few things.  Then it stops on the following message

!! 0xc01a001d! 9499/97970 (\Registry\Machine\COMPONENTS\DerivedData\...)

There is nothing to click on or go back.  The screen just stay on it.

Can someone help me; (a) help me to fix this so I can use the computer, then b) tell me what it is that it has caused in the first place.

I would be really gratefull for any help that anyone can give me.

Thank you very much!

The update is not installed successfully, you receive a message, and the computer restarts when you try to install an update in Windows Vista and Windows 7
http://support.Microsoft.com/kb/949358

This article lists some recovery options.

Harold Horne / TaurArian [MVP] 2005-2011. The information has been provided * being * with no guarantee or warranty.

Tags: Windows

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