Windows 10: my screen restarts every half hour very annoying when in the middle of something

My computer restarts every half an hour which is very annoying when in the middle of something. how can I stop this please?

:)

 

Screen goes black exactly every half hour

My Windows 10 pro desktop has begun an annoying habit. Every half hour, at exactly :02 or :32, the screen turns off, exactly as if I had left the machine unattended or not touched the keyboard or mouse in a long time. To be clear, this is while I am using the computer -- sometimes in the middle of typing or moving the mouse.

After it goes black, moving the mouse or touching the keyboard then turns it on again, bringing me to the locked screen, where I have to enter my PIN.

The power plan is set to never turn off the monitor.
The screen saver settings are set to never fire the screen saver.
Changing keyboard and mouse hardware has no effect.
Virus scan turned up nothing.

While typing this, it brought up Windows 10 lock screen appears every 30 minutes regardless of activity as a possible question match. That question is over two years old, however, and has no answers; and my problem just started last week. So I would appreciate a fresh look at this.

Is there a way I can at least determine what process is locking the screen?

 

Screen splits down the middle after going to sleep

Sometimes when my PC goes in to sleep mode, the screen will be divided down the middle with one half 1cm higher than the other side. It fixes as soon as I restart my PC.

I haven't been able to find reference to this problem anywhere so far.

I've checked all my drivers, same problem.

What's the next step?

Cheers,

 

Flashing half circles along the bottom of my screen

Hello Ian,

I understand the inconvenience you are facing in Windows. We will help you.

I suggest you to login to the safe mode and check if the same issue persists.

If you are able to go to login screen in normal mode try the below steps to go to safe mode with networking.

• 
  At the login screen click on the power symbol.
  
• 
  Hold SHIFT + Click Restart.
  
• 
  After restarting your system, select the Troubleshoot option.
  
• 
  Select advanced options under
  Troubleshooting screen.
  
• 
  Click on Startup Settings.
  
• 
  Click Restart and follow the onscreen steps to go to
  Safe Mode with networking and check if you are able to login.
  

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Please get back with more information, we will be glad to help you further.