Well.cracked OS is always an issue somewhere along the line...not good idea to advertise either
However i have used tis on many occasions to kill virus that prevent me from installing anitvirus, so some sorta protection software:
http://housecall.trendmicro.com/ it may however refuse to help due to pirated OS...worth a try tho.
download malwarebytes as well and run full scan, MBAM is awesome software and its free

Should be on every gamers pc by default imho
Failing that, looks like someting is trying to autorun in the background and effect changes...so check startup folder, temp folder etc...
I have recently had bogus antivirus softwares installing via drive-by-download on users pc, and because it doest actually "install" it doesnt get blocked by trend...however this software block me from accessing task manager,msconfig etc..basically anything that i could use to kill the process. So needs some creative thinking to track it down and kill process

nothing picks it up, and the actual exe hides in the appdata hidden folder, under some obscure name .exe , so maybe see if you can acces your task manager or not...will quickly let you know whats going on.
I always run an administrator and a main account, cause this sort of virus would only run in the current profile, so can kill proccess via another admin profile...