A long post is welcome, plenty of information.
1. Anti-virus software update and full scan
2. Disk check ; click here
3. (and this is what I think is the root cause) Failing PSU ; try the machine with all unneccessary hardware disconnected.
The Evil Within 2 review-in-progress
InVision Studio takes on Adobe XD and Sketch
Camera tips to take better iPhone photos
Comment transformer un iPhone en borne Wi-Fi ?