Task Manager Doesn't Help Errors

Doing Work

I was just doing school work on my computer as always. And I needed to message my teacher on Google classroom. I did. But then my computer got really slow and unresponsive. Then next thing that happens BSoD. This is the first time I've ever gotten a BSoD on my computer and the error was dpc_watchdog_violation. I was confused and decided to look it up on my phone. It said that the hard drive could be corrupted and a bunch of other things. So as always I rebooted my computer so I could do some more work ,well rather get it finished. But I was greeted with something that wasn't the Windows 8.1 login screen. Yes I still have to use Windows 8.1 my computer can't update to 10. I was greeted with a black screen. Almost like the command prompt. But it wasn't a window. It was just a black screen with some text on it. It didn't say "Please insert installation disk" it said "Please [unknown text] ____________----______".I had no clue what to do. But I do know that yesterday I tried to login to xfinitywifi and got a rather... menacing message. It was an Error 403| Forbidden. And task manager ties in with all this is because... I couldn't close these windows like normal windows. But task manager wouldn't respond once I closed the Windows. But back to the main part of the story now. The screen turned from black to red...