Are you running some anti virus program?

This is a link to a similar discussion in these forums.

http://reviews.cnet.com/5208-6121-0.html?forumID=45&threadID=37294&messageID=435930

Here are more links to good, free, programs, that will help protect your computer from such as this.

Adaware se personnal
http://www.lavasoftusa.com/software/adaware/

Spybot Search & Destroy
http://www.safer-networking.org/en/mirrors/

cwshredder
http://www.intermute.com/spysubtract/cwshredder_download.html

Stinger
http://vil.nai.com/vil/stinger/

Spyware Blaster
http://www.download.com/SpywareBlaster/3000-8022-10196637.html

AVG Free version Anti-virus Software
http://free.grisoft.com/freeweb.php/doc/2/

Switch to Firefox Browser
http://www.mozilla.org/