Don't try to remove the CPU cooler yourself.
Don't try to remove the CPU cooler yourself.
you referred to a situation taking about three hours with a slightly rounded third screw. I think you might have misread or altered it significantly. the correct approach would be to use the appropriate screwdriver—typically a Phillips or flathead—and avoid forcing it, which could damage the screw.
If the image displays a completely removed screw, I’d just let it stay put. Otherwise, you’ll need to drill through it, and it’s unlikely you’ll locate a substitute that matches the original strength. If the screw was indeed taken out as shown, your options are limited, which is a tough situation.
You can purchase an affordable collection of "flush cutters" on Amazon, then target the screw's head by placing one half inside the drilled hole and the other against its side. Hold it firmly to make a slight cut and rotate. Continue this process to reinstall.