MSE update options are pretty sparse, I wanted my MSE to update at every startup and while looking around I found this. Code: ping -n 11 127.0.0.1 >NUL cd C:\Program Files\Microsoft Security Essentials start /min MpCmdRun.exe -scan -scantype 1 Just make a batch file and put a shortcut in your start-up folder. The ping command is to force a delay of ten seconds (to allow internet connection to be established for wifi users) Remove it if you so choose but if you have update problem after removing it put it back. When you start-up you will see a dos box popup then minimize and after about 30 seconds it will disappear. There is an MSE update utility but I had problems with it working only sporadically.