Windows 10: Computer randomly blackscreens, on restart fixes.

First, the computer LAGS. I have a very nice computer, so that is not normal. Then, after a few seconds of lagging, it goes normal for a few seconds. Then it blackscreens and I have to restart my pc. This happens a lot, and I would like some help on it. Thanks!

:)

 

random restarts

Hi Lili,

Hardware failure or system instability can cause the computer to
randomly restarts. As our initial troubleshooting step, we suggest you to run the Power troubleshooter on your computer and check if it fixes the issue. Here are the steps:

• Press Windows key.
• Type Troubleshoot.
• Under Find and fix other problems look for
  Power.
• Then Run the troubleshooter.

Update us with the outcome and if you need further assistance.

 

Computer restarting randomly

Hi,

We want to know more about the issue you're having with your PC starting randomly. Please answer the questions below:

• When your PC restarts, are you having any error messages?
• You said you got the computer fixed, do you remember what changes were made to the PC? Is this before changing the power supply or after?

Your response to our queries will be appreciated.

 

Blackscreen - Auto-Restart

Thank you for the suggested 'fixes'. I'll try them after I try Google's Chrome browser. I'm told it's more suited to a desktop environment than the Microsoft EDGE browser (more suited to Tablet use). I don't know if it's related to the "BlackScreen Auto-Restart"
problem, but hopefully it will reduce/eliminate the "Can't Reach This Page" message which I frequently get using EDGE [I tried restarting my modem and router, as well as clearing browsing history, but the problem persists with EDGE.