Though before running the above could you install and run getsusp so McAfee will hopefully notice the malware and work on a fix. Add your email address to the program's preferences run it and it will send any suspicious files to Mcafee and then follow the link above
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can you check and remove any unwanted applications from control panel , Check if for any new extensions added and home page settings in browser settings.
This thread is old will lock thread as poster probably sorted this out years ago. thanks for adding that pertinent info