I have MSE installed on a home computer (32-bit Vista). The system tray 
icon is perpetually orange and unhappy that my system is "at risk" 
because the scheduled scans fail to run. The computer is left on at the 
times when the scan should run, but so far the scheduled task has never 
run.

Meanwhile I have FEP (essentially the same product, right?) installed on 
my office computer (64-bit Win7). The scheduled scans run just fine, and 
the tray icon is a nice happy green.

Any ideas?

-- 
Helen Read
Senior Lecturer
Mathematics&  Statistics
University of Vermont