How do I stop frame drops during stealth missions in TLOU Part I?

I was stuck in a ruined street, watching Ellie's turn lag by 12.3-15.1ms per AIDA64, which completely broke the tension. I tried clearing temp files, but it did nothing. The issue was background processes stealing memory. I used GamePP Resource Scheduler to set the game to Real-time priority and switched to High Performance mode. AIDA64 showed the frame time converged to 8.1-9.4ms. The memory controller load stabilized, and the cooler stayed at 58-63℃. It finally feels responsive again.