So last night I was up till 2 o'clock trying to sort out a problem with my laptop. For some reason I couldnt access web pages but could ping known websites IP addresses. It was looking like something was screwing with my DNS. Also on login I was seeing two cmd windows flashing up and disappearing upon login. Had a look at my hosts file and could see that everything had been changed to resolve to my localmachine but I couldnt edit the hosts file "c:\windows\System32\Drivers\etc". Anyway I installed XP SP3 and that seemed to sort the web browser problem. However I still couldnt update any of my security programs, ie AVG, Spybot, Ad-aware etc. after a bit of googling there seems to be a fairly new worm/trojan created to cause these effects. It modifies registry keys creates a few files in the temp folders and dumps the "iamfamous.dll" file in your "c:\Program Files\Mozilla Firefox\components\iamfamous.dll" Came across TrojanRemover which is free to try for thirty days and it did the trick. I believe Avanger can also sort it anyway heres a link to a more detailed discussion on the problem.
http://www.computing.net/answers/security/cant-get-rid-of-iamfamousdll/24144.html
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