Recently my old laptop broke and I got a new one and I've moved my old catalog and photos from LR Classic to my new laptop/ external hard drive and I don't know if I'm missing a step or what but I get these little red, green, and blue pixles in box patterns everywhere on my photos. If anyone knows anything on this or has any ideas that would be greatly appreciated!
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My guess is camera sensor malfunction.
My 2nd guess is bad GPU or bad GPU driver.
Can you exlpain to me what the GPU is and how that would effect the image?
A GPU is a Graphics Processor Unit, something that most modern computers have, it is a card in your computer that actually displays everything that appears on your screen. (Some computers don't have a GPU and the screen is displayed via the motherboard, but that's rare today).
In Lightroom Classic, go to Help->System Info and report what it says on the line immediately under "Graphics Processor Info:". (And don't show us the rest of Help->System Info in this case)
Is this on all photos you've take resently or just a few?
If all then I agree with @dj_paige , Sensor problems. If just a few then either Card malfunction or other hardware problems that are corrupting some files.
My guess is also a Camera Sensor Malfunction, or Hard-drive errors.
I had a Canon 'compact' that produced images like my screen-clip, especially in cold conditions-