Laptop has been acting like it has a mental disability lately.

I loaned it to a family member for give or take 2 months and I've recently been having problems with games crashing/loading/lagging. I'm honestly considering buying a prebuilt because it's pissing me off. It has a hard time launching low quality games like Roblox, American Truck Simulator, Beamng, and so on. I just don't know what to do at this point, do I get it serviced? Do I buy a new computer all together?

FIXED: Update fucked it up. I had to uninstall the updatd