I know it's an old topic but I had the same problem and solved it ( some how :D ) ...
And I'd like to help out people with the same problem..
Heres what I did..
and hit enter..Then type this exactly after the cmd program starts: netsh interface ipv6 uninstall
after it will confirm the uninstall..then reboot computer..
Then I downloaded Panda Antivirus 2008 and did a full system scan and cleaned everything..
You can download the full version here(with crack)..After cracking it wait for it to automaticly update..When it says "update completed" then start scaning the system..
after that my problem was solved..