Why? If I read http://www.peterritchie.com/Hamlet/Articles/63.aspx and other links about this message it appears that spyware could be trying to startup a browser and has failed. It's either that or some other program that needed updating.
What I usually do is scan the machine with Free AVG AntiSpyware and eject what it finds.
My wifes computer is attached to mine through a network. She is running Win XP and I recently went to the microsoft updates site on her computer to download IE7. Everything seemed to go all right and I had to restart the computer so it would take effect. IE started up but the old version and I cannot seem to get any web page apart from her home page which is MSN.
When I type in a new web address I get the message saying
"The Requested Lookup Key Was Not Found In Any Active Activation Context"
Any help would be useful