I got a pop-up from avast saying it detected a malware infection, well i don't really know if it is but not sure. Would appreciate if someone knew if it was infected, and sorry for my bad English

I'm from Sweden.
http://img8.imageshack.us/img8/997/malwaredetection.jpgThats the pop up, and sorry it's in Swedish, but i will try to translate.
A suspicious file is found (using the heuristic method). This may be a sign of malware infection. Please send the file to our virus lab for further analysis.
Filename: C: \ Windows \ system32 \ PnkBstrB.exe
Type: hidden services
And the thing is.. I'm the admin on my computer and i can't delete it or turn it off in the Task Manager "Services" it still runs after i exit a game or so.
Thanks in advance.