Shouldn't change how you play csgo.
Can always turn it back on if don't change anything.
One way is what the op said in that thread;
"Here's how to disable it: Windows Settings > Gaming > Game Bar > "show game bar when I play full screen games Microsoft has verified" and "record clips, screenshots..." should both be OFF."
Or locate csgo exe > compatibility tab > check disable fullscreen optimisations.
Try both ways.