VSSTat.exe
(McAfee)
System Tray icon for McAfee VirusScan which enables you to start VirusScan from the System Tray.
Recommendation :
If you get errors mentioning VSSTAT, as many users sometimes do, obtain the latest program updates for VirusScan (as opposed to virus definitions updates). If that does not solve the problem, disable VSSTAT with Startup Manager.