Windows 10: Why did my CPU works poorly after updated to windows 11?

Hi,I’m a new user and not an expert but I’ll try my bestSo I just updated to windows 11. But I noticed that my pc has gotten very slow after a while. Everything is slow including opening the startup menu, windows antivirus slow from usually 1 minute to 1 hour 47 minutes. Games is also unplayable because of my pc poor performance. Then I downgraded back to windows 10 but still no luck. The lag is still there. I suspected the problem is with my intel i7-14700F cpu. In the task manager, base speed is 2.10 GHz. When i just started my pc, the speed was fine but time by time, the speed decreased un

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My CPU is on the supported list but will not update windows 11

You looked at the Windows 10 cpu list.

This is the Windows 11 cpu list, your cpu is not listed.

https://learn.microsoft.com/en-us/w...supported/windows-11-supported-amd-processors

 

Window 11 CPU Requirements

Hi. Are you going to be expanding the list of approved CPUs for Windows 11 please? I have seen the list at Windows processor requirements Windows 11 supported Intel processors but this doesn't include my CPU (i5-7200U). However, my CPU more than meets the speed and core requirements (2x2.5GHz) and is more capable than many of the CPUs on your list (e.g. Celeron 6305 at 2x1.8GHz). Thanks

 

Windows 11 CPU not supported

You saw the wrong list --- the Windows 10 21H1 CPU list.

Windows Processor Requirements Windows 10 21H1 Supported Intel Processors

The Windows 11 CPU list does not have your CPU.

Windows processor requirements Windows 11 supported Intel processors