Following the break out of Sasser, most antivirus companies have provided custom made scanners to locate infected files and remove them. One of these popular programs is Stinger, by Network Associates
Stinger is a stand-alone utility used to detect and remove specific viruses. It is not a substitute for full anti-virus protection, but rather a tool to assist administrators and users when dealing with an infected system. You can grab a copy of the latest version by clicking here and then proceed to Microsoft and download the appropriate patch for your system.