This is my first time on a forum like this, so please take it easy on me :) Really hoping to find any kind of fix or get at the very least a faint idea of what's going wrong with my laptop (specifically for gaming).
Background: This laptop was purchased back in 2021 by my father, who used it for work (for a short amount of time) before giving it to my sister, who essentially never touched it. Neither of them really intensively used the machine as far as I know. I've been using an old predator model with a GTX 1660 Ti and a 9th gen i5 processor, so I was very happy to take it off her hands.
I tried playing Marvel Rivals on it, and for a couple days everything went excellently until I started crashing - now the game rarely launches, and when it does I get very weird graphical glitches in the menu before it crashes again. I tested this with other games, and it seems to me that any game with more modern graphics (Fortnite, Doom Eternal, Halo Infinite) either crash, experience the same strange graphical glitches, or both (if this post gets traction I'm more than happy to upload a video of what I mean). I have no idea why it would be working fine then suddenly stop. Less graphically demanding games like Phasmophobia and TF2 work perfectly fine.
I have tried many fixes I saw online, including a clean install of graphics drivers using DDU, factory resetting the computer, using older graphics drivers, applying any kind of update I can find, disabling integrated graphics, clearing shader caches, etc. I just would really love to know what's going on, and any kind of help is greatly appreciated.