Go to Here:
http://securityresponse.symantec.com...w32.pinfi.html
1. Disable System Restore (Windows Me/XP).
2. Update the virus definitions.
3. Restart the computer in Safe mode (Windows 95/98/Me/2000/XP) of VGA mode (Windows NT).
4. Run a full system scan and repair all the files detected as W32.Pinfi.
5. Reverse the value that the virus added to the registry.