Quote: Originally Posted by Jo6Pak
I would like to know if its OK to leave it set to Automatic.
Excuse my ignorance. I've used XP for soooo long and I'm still ramping up to the nuances of 7.
Yes, it will be safe to leave it set as Automatic. The "Automatic (delay)" does the same thing, but waits a bit after startup for it to start instead to give other applications a quicker startup. Something may be interferning to prevent Windows Defender starting up during the delay time, and that may be why it will start when you have it start automatically without a delay.
Looking in Event Viewer as Kage posted may help determine what it may have been.