Since I use Sandboxie in addition to Bitdefender Free I clicked the link. It loads fine and in NoScript I don't see Yandex. Yandex tries to connect to my website's often and are permabanned. You might want to run Hijackthis and paste the results here:
http://www.hijackthis.de/en
Then run Freefixer and go through everything, clicking an entry you find suspicious. But bewarned as you could cause damage if you delete the wrong thing. Also, Everything.exe can help you find a dll or .exe you need to locate. In fact, Everything.exe is my only Windows search tool. I turn off indexing and the search service.
Autoruns can help find startups you don't want as well, but like Freefixer be very careful.
If you find a service that you need to delete. Go to command as Admin., enter sc delete servicename. If the service name has a space then add quotes. sc delete "service name"
Run Adwcleaner and Junkware removal tool.
That's proabbly more Info. than you need. But just in case someone runs across this thread.
I have a whole list of anti-virus crap I run at my forum. It's in the Security subforum at the bottom in the index page (main page)
If it's really bad, check out the Bitdefender Rescue disk and burn to CD. Boot the CD like you would install Windows and scan the computer. Make sure you have an Internet connection so that the definitions are updated.