Sounds like W32.SillyFDC / W32.SillyDC to me.
Run a scan in safe mode only to remove the virus.
Also, disable Autoruns, System restore before you do this as the virus also creates entries in the System Restore Points store volumes.
You should also run a full suystem scan in safe mode with networking and let us know if the issue has been taken care of.
You should submit one of the exe files to Symantec Security response team as well.
Aniket