Attached Link: http://securityresponse.symantec.com/avcenter/venc/data/sulfnbk.exe.warning.html

No need to worry! This is a well known virus hoax. Do not delete the file sulfnbk.exe unless you are absolutely sure that your computer is infected! The file in question is not a virus, but a perfectly legitimate Windows file. It has however been known to carry infected code, so if you receive it in an e-mail, you should delete the e-mail. But DO NOT delete the file if it already resides in your computer! Read more at Symantecs site at the link above.