I read somewhere that while MSE (Microsoft Security Essentials) is good it is recommended that it be combined with AdAware. Not all updates were automatic. I didn't have problems, but I found the manual updates to be bothersome. I went back to AVG Free.

Also...there is a virus out there that is called Microsoft Security Essential. A client of mine had it on their machine and it was a bugger to get rid of. I don't know where it came from but if you want MSE be sure you validate that it is the bonafide program.

Eddie