My computer crashed, and a weird pattern of pixels was left on the screen

Solution 1:

It appears to be a memory issue. To see if it's just temporary, do a full shutdown and reboot.

• Press Windows and type CMD.
• Press Enter to get a CMD prompt.
• Type shutdown /s /t 0 .
• Reboot and check for the pixel problem.
• If that does not resolve the issue, turn off Fast Startup, which may be caching invalid data, and repeat the steps above.

Let me know if this helps!

Solution 2:

I would try a different screen resolution and if possible a different monitor.

If it only shows on one monitor then you know the monitor is the problem. And changing the screen resolution can have multiple outcomes. All will help to analyze the problem further.