For the last 2 days Windows Defender would not update [I update the service manually a few times a day]. Even when I tried to update direct from MS Definition Security Portal, it still wouldn't update.
When I checked 'services', Windows Defender is all grayed out ...
When I checked in 'action center', Windows Defender had been switched off. I switched it back on but still could not update the service.
I ran Malwarebytes [however before running the scan I attempted to update same - it stated no updates were available which didn't seem normal to me as I hadn't updated MWB in quite a while]. The scan found a few innocuous, non suspicious files which I removed.
I then attempted to run Kaspersky ... it ran for about 30% of the scan and then just disappeared from the screen. When I checked 'Task Manager', the only thing that was running was Windows Defender. It continued to run about 50% of hard disk for about 3 minutes and then settled again.
I decided to try a system restore. After completion of same, I attempted to update Windows Defender .... it updated to the latest definition!! However, when I checked in the 'action center' it still said it was switched off. I've switched it on again. But Defender is still grayed out in 'services'.
I've checked regedit and wondered if these values were correct ...
Apart from the problems with Windows Defender, my system is running normally, [apart from a recent 1GB loss of free space on my C: drive, which is unusual]. I'm still concerned that I may have a virus as I don't know how Defender was switched off in the first place.
My OS is Windows 8.1
Any advice would be welcome.
Edited by b1uevoid, 22 May 2016 - 06:20 AM.