Sounds like you have a virus, something like the Blaster worm, that one disables av proggies and will re-boot the system.
Try doing a scan in safe mode also check the virus encyclopaedia at click here
Xiaomi Mi Mix 2 review
What went wrong at the Designs of the Year 2017
iPhone X news: Release date, price, new features & specs
Comment regarder des séries et talk-shows américains en France ?