I've got a problem with the display on my PC.(running Windows 10 64 bit) It keeps flashing on and off and every time it does the resolution changes. It switches to anything between 1024 x 768 and 1440 x 900.
I've checked the display drivers and they are all up to date.
Have you tried restarting the computer in Safe Mode only (no networking) to see if that changes anything.
You say PC so it would appear that you are referring to a desktop as opposed to a notebook type computer, if yes, check that it is not the screen itself or the video cable that has the problem, if you do not have another screen to try but you do have a notebook try hooking up the screen to the notebook and see how that goes.
If this is a desktop PC, please post the brand and model name or number of the PSU.
Download then run Speccy (free) and post the resultant url for us, details here, this will provide us with information about your computer hardware + any software that you have installed that may explain the present issue/s.
To publish a Speccy profile to the Web:
In Speccy, click File, and then click Publish Snapshot.
In the Publish Snapshot dialog box, click Yes to enable Speccy to proceed.
Speccy publishes the profile and displays a second Publish Snapshot. You can open the URL in your default browser, copy it to the clipboard, or close the dialog box.