Unfortunately, no one may have an answer
What kind of support forum is this? No one has an answer?
Sometimes, there are cases, where no one really knows why you are having the problem. Granted, you have given us some information, but it is an odd sounding problem. There are many reasons this could be happening.
Your video card could be dying.
Your Windows installation could be corrupted by malware, trojans, or viruses.
Your video drivers could have been corrupted.
Can you give us some system specs to work with? Otherwise, you may want to download the latest drivers for your video card and see if the problem persists.
You may also want to run a free virus scan:
Free ESET Online Antivirus Scanner
The problem is unusual, but artifacting and strange display rendering problems on the screen are usually the sign of a faulty video card or poorly seated video card. You need to eliminate the software problems before you start to make conclusions on whether this is a hardware issue. This begins with a process of elimination that needs to be done carefully. Please post additional system specifications, and I can try to help you further.
For example, what video card are you using? Do you know? If you do not, you can usually find out from the manufacturer if its not custom-built. If its an integrated video card, the problem could be unresolvable, but if its dedicated, it may be solvable.
Assuming its not the video card, and is in fact a corruption of Windows, you may want to try
Malwarebytes. Did the problem start suddenly or has it gradually gotten worse? Was there a time when the problem did not exist? All of these questions need to be addressed and that is partly why you have not received a thorough attempt at an answer.
And, unfortunately, being the open community this is, no one is obligated to assist you. Although many of us are very much willing to help you.
