Windows 10: Black screen intermittently flashes on Windows 11 Home 64-bit edition

I've been searching for a fix for this problem. For starters, Windows 11 is up to date. As are my graphics card drivers. My system RAM is 128GB. My graphics card has 16GB of it's own RAM. My card has an HMDI connector, and feeds video AND audio to my home theatre system A/V receiver. The majority of fixes I've seen concern laptops and systems running Windows 10. I do not have a laptop, only a gaming PC. I've also searched on YouTube, with no results for my particular version of Windows.My "rig":Monitor: 58" 4k UHD Hi-Sense 60Hz Refresh Rate Television, HDMI 4K cablesA/V system: Son

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Getting intermittent blue screen restarts with Windows {10 64 bit}

Getting intermittent blue screen restarts with Windows {10 64 bit}

 

Intermittent black screen Windows 10 64 bit

My Dell XPS computer screen intermittently black out. It seems to happen mostly when I run Windows apps. I have run SFC and DISM and nothing has been found. In Device Manager I have two Display Adaptors - Intel(R) HD Graphics 4600 and NVIDIA GeForce GT
75M. I disabled the NVIDIA adaptor which didn't stop the black screen events. I then did the same with Intel and on reboot this put me into Safe Mode. This was not what I require so I am stuck with the flashing black screen. It does seen to be erratic in nature.
When I start, it is infrequent, then as time goes on it starts to become more frequent, then sometimes less. Quite distracting. Have you any ideas as to what else I might try?

 

Intermittent black screen Windows 10 64 bit

I started with just the Windows key + Ctrl + Shift +B but on the second day the flashing black screen returned with vengeance. At the time I was using Outlook 2007 and followed a link in an email to a web address using IE 11.

I was also using Excel.

I will now go to the next stage.