When my seti screensaver comes on the computer restarts. I have no idea what I did to do this but it started last night. I reinstalled a driver for my video card but I can't see that causing the ...

So I had been running Mojave and the HDD part of my Fusion drive on 2017 iMac 5K failed. I took it to local Apple Store to have the HDD replaced. I did ask them to reinstall Mojave but after a 12 hour ...