asus rog strix b350-f gaming motherboard

Just put together a new PC with the rog strix b350-f motherboard and everything worked fine. Installed windows 10 played games on it then leaving it sit for a little bit came back to find it on the bios screen and now won't boot into windows instead it will come to a screen with a flashing...

Brought my computer home from a technician to fix my CPU fan error. Everything was working perfectly fine on my computer at the shop when I went there to pick it up. Was able to log in with no problem. Got home, did a quick un-build to do cable management, and plug everything back in, got power...