Pondus
4
well avast call it “Kukacka” and most others call it Sality…meaning a fileinfector
example
http://www.virustotal.com/file-scan/report.html?id=c5ea0ded598c551f4da2764f8fe861a7698b5ea555dec1de1c4f38f6e65442f3-1309254049
this usually means format and reinstall 
anyway lets here what Essexboy say…