So I've been having this issue since I started playing fangames a few months back where anything that is built before GameMaker Studio will progressively slow to a crawl moments after launch. A reboot will fix this, though, for at least a few days. Strange right? I can play GMS-built games like Micromedley perfectly fine, but not something like Cultured. I can also play anything resource intensive like Dark Souls 3 with no trouble at all despite this occurring. Looking through task manager, nothing rogue is running and CPU/RAM use is low on everything including the affected fangames. Here's a video that demonstrates it slowing down right after launch;
I'm running Windows 7, i7 2600K, AMD R9 270X, 8GB RAM. I welcome all suggestions on fixing this issue. I've already tried disabling Aero, lowering resolution, different compatibility modes, high CPU priority, etc. It seems to me to be some kind of funky timer bug involving old GameMaker/fangame engines, but I can't find anything about solutions online.