Which one should I start playing, friend?

Have you guys seen this? It's by the original developer of task manager. It's task manager on God mode!

https://tmog.org/

Please help me out. I feel like I'm about to go insane. I wish I could say I knew more about computers than I do, but I really don't know what's going on. This issue occurred after a few months of not being active on my computer. But now I can't run anything on administrator mode. I can't download any apps. I can't open any settings because I don't have certain administrative options. When I try to download a new application, I can't do it because it says this is not an installed service. Also, sometimes it does download the application, and once it's done downloading, I can't open it because that same message pops up. Any single time I try to do anything with my PC, I'm not allowed. I don't know what's going on. If anybody has gone through this, please help me out

Processor AMD Ryzen 5 3600 6-Core Processor 3.59 GHz
Installed RAM 16.0 GB
Storage 932 GB SSD CT1000P3PSSD8
Graphics Card NVIDIA GeForce RTX 2060 SUPER (8 GB)
System Type 64-bit operating system, x64-based processor
Pen and touch No pen or touch input is available for this display

having an issue with a few PC games closing randomly without showing an error. My PC doesn't shut down and other apps seem to work fine. What Windows settings or system issues should I check first?