Recently i wanted to update my graphics card. I was updating it and suddenly my pc froze. I restarted it but now evry time i start up my pc it freezes after like 15-20 minutes and it doesn't unfreeze. It also get some weird green pixels. Also after i force shutdown and start my pc back up again it powers up for a second and shutdown again and need to wait for like a half hour to start my pc back up again.