Windows

boot your pc into safe mode and update the virus definitions for whatever virus scanner your using then do a complete scan on your system. It is possible that you may have a virus on your system but first we need to determine what kind.

If the safe mode solution doesn?t work, try to download some bootable CD with antivirus solution, like P.H.L.A.K. , boot from this Boot CD and run the antivirus, and antyspyware software. The other solution to scan your computer online. For this here are 3 links for free online antivirus scan.
http://www.pandasoftware.com/products/activescan?NRMODE=Published&NRORIGINALURL=%2factivescan%2f&NRNODEGUID=%7b3B202047-35D4-4DA2-B310-B1DBEC2971F2%7d&NRCACHEHINT=Guest

http://www.ravantivirus.com/pages/index.php

http://www.bitdefender.com/scan8/ie.html

May God have Pitti on your soul;

It is a virus, and a fast spreading virus on networks so disconect all afecte PC's from your network, Run AV software, after detecting study up on the internet since traces of it will stay and must me removed manualy and update your system firewall configuration to block all ports exept HTTP and DNS, after that connect, update AV software, ReScan and Quarantine for a week.

Virus Atact .exe and .com all running are infected and some are deleted so check and restore from CABS