Prevx CSI

Free Malware Monitor
1 in 3 businesses are at risk from infected PCs running rootkits, advanced spyware and other forms of malware.
You can use Prevx CSI Business free of charge to monitor up to 100 PCs or servers for rootkits, advanced spyware and malware that have broken through your existing PC security. You can use it right now as a powerful free malware detective to ensure your business is safe and stays safe.
Adds to your existing security
Monitoring your business PCs with Prevx CSI Business significantly improves your businesses defenses by boosting your antivirus malware detection. Prevx CSI Business is much better at detecting new and evolving threats than conventional antivirus, antispyware and PC security suites. The Prevx CSI Business software accesses our massive real time threat database ensuring it is always up to date.
http://www.prevx.com/freescan.asp