Could be just Windows corruption, but to be sure you're not blasted...*;-)

Download and run these two programs (Spybot S&D and Adaware). Use Spybot first.

Chris has posted an excellent tutorial by dgosling on how to run Spybot S&D and also how to enable customized deep scanning functions for Adaware. Once you set these options they will be retained for future scans by Adaware.

Follow the directions in this detailed guide for Spybot and Adaware...go slow on the directions for the custom setup of Adaware:

http://www.cjwd.demon.co.uk/spybot-adaware.html

I also like to run Windows Disk Cleanup after cleaning with those two tools. Make sure you reboot if any reboot cleanup functions of Spybot and Adaware are advised by these tools (this may happen at the end of their cleanup).

Reboot and click on Start/Run/ type: cleanmgr
I check all the selected items to be deleted here.

Next: download Hijackthis. Go here and download the zipped file:
http://tomcoyote.com/hjt

Please unzip Hijackthis.zip into a new folder you create in the root level of the C: drive. Name this folder C:\HJT for safest results.
See this link for additional instruction: http://russelltexas.com/spywareinfo/createhjtfolder.htm

Run Hijackthis, click on the 'scan' button and then 'save log' button. Copy and paste the contents of the text file you save into a reply to this message. A lot of posters make mistakes in copying and pasting so reread the left info sidebar called Copy and Paste at http://www.tomcoyote.com/hjt

HTH,

Texruss