Computer slows down after being on for a few hours

[Windows 11]

Hi, I've been having this issue for a few months now where my pc slows down really bad after its been on for a few hours (the longer its on the worse it gets) when I checked task manager, all my usages for low. I have tried to run antivirus software, defragment my drive, set every performance mode i could to max, check background programs and close programs, but still slow.Specs:AMD Ryzen 7 5700G with Radeon Graphics32.0 GB (27.9 GB usable)Device name DESKTOP-UUDNP99 1TB NVMe SSD1TB SATA SSDNVIDIA GeForce RTX 4060 TiI can give more information if neededThanks!

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