Renderer issue, White dots on Screen

I'm using Premiere in a PC and I have 3 options for Renderer:

• Mercury Playback Engine GPU Acceleration (Cuda)
• Mercury Playback Engine GPU Acceleration (OpenCL)
• Mercury Playback Engine Software Only

Currently, when I'm using the first two, while I'm editing, white dots appear all over the screen.

When I use Cuda, the videos usually crash midway when exporting.

When I use Open CL, the dots that stay on the exported video.

So I have to delete the renders switch to Engine Software only, render and Export and that seems to be the only way now to get white dots on my videos.

Today I started noticing white dots when I'm editing using Engine Software Only, but it seems that once rendered and exported the white dots are not satying on exports.

I believe I'm having some sort of CPU GPU issue but I don't know how to fix. Tried updating windows and Nvidia drives, but  no change. A few weeks back I did a Reset of the PC through Recovery, it first it worked but then few weeks later the issue came back. Already uninstalled and reinstalled Premiere twice.