Windows Defender has turned itself off. I am using the Limited Periodic Scanning option and have moved the slider in settings to turn it back on without success - after exiting Settings and going back in the slider has moved back to the off position. Pressing the Turn on Windows Defender button has no effect - I get an error as follows:
The Service couldn't be started
The specified service does not exist as an installed service
Click Help for more information about this problem
Error Code: 0x80070424
Virus and Spyware definitions are shown as being out of date and can't be updated.
Clicking Help brings me to this forum - not really helpful!
Any ideas anyone?
[Original title: Windows Defender]