raman
3
If you use a router, why do not try to block the scaned Ports? And what do you call
“Stumbler”? Identify the Ports and take a look at the desktops which Programm uses this ports. You could use http://www.sysinternals.com/ntw2k/source/tcpview.shtml for that. If you can identify the file send it to Avast, or Panda…
But as alwayse, using a clean Backup is recommended…