Hello, I have been having this problem for a year now. At first I didn't know what caused the sudden slowness of my PC but then I discovered that it was because the processor went from its normal speed of 3.50 GHz to 0.5GHZ. I have tried everything possible, from formatting the PC, to messing with the BIOS but nothing. Now the current situation is as follows: Whenever I open the computer or when I turn it on after suspending it, the computer starts up at the 0.5GHz processor speed, and I have to simply reboot it to get it back to its normal speed. I have to do this 100% of the time when I open the computer, and then it always works fine.
The processor is an AMD Ryzen 5 1600 Six-Core
Thank you very much!