Task Manager Doesn't Help Errors

New Screen

The screen turned from black to red and black again. This time it said something else. It was like a genuine windows blue screen except black. It said
_____________
| WINDOWS |

Microsoft™ suggests you stop using this
computer. If you continue to even try
to use this computer either you or the
computer could be majorly injured or
damaged. Please don't try to continue.
- Sincerely,
Microsoft Corporation
Error_code-severe_damage

I stared in shock. My step dad had this computer since it came out. Why is this happening now? He gave this computer to me a year ago when he got a new computer. I'm still really confused. I went on Google to see if anyone else has this problem . For some reason I got the same error code that I did on xfinitywifi. The page noticed my submission but didn't want to load. Is there something they are trying to hide? I didn't know. At this point I didn't want to touch anything that had anything like this. So I used a computer I only use rarely. My grandpa's Windows XP laptop from 2005. I never really use it because I think it would run really slow. I got on it and signed into my account. It said I still needed to activate it. I never did because we don't use dial-up any more. But I really needed to so I used USB tethering. It did work. So I tried to do contact Microsoft. Couldn't even get into their website. When it loaded all it said is that Microsoft servers are down. So that could have been the problem. I tried to use my actual computer again. It booted but not without flashing multiple colors. Mostly red. I got to the sign it page and entered my password...