You have the ms Blaster worm on your PC. MS patch that fixes the issue
http://www.microsoft.com/downloads/d...displaylang=en
here is the link to the norton page about the virus and a removal tool
http://securityresponse.symantec.com...oval.tool.html
edit: here is the MS page that explains more about this
http://www.microsoft.com/security/incident/blast.asp