i have a lagging mouse problem which started a few weeks ago.
I have isolated it to the AMD RX580 graphics card.
I am running Windows 10 Pro with a 10 generation i5 processor.
I have installed the latest driver for the graphics card.
AMD support is of no help since they have not responded to my problem.
Any help would be greatly appreciated.
Shared your problem when was on Intel platform.
Now I have not seen it again.
I tried everything like you. At some point it start to lag and in Task manager you can see DWM.exe heavy load when you move mouse(with pinned windows).
You can try to change your 500-1000 hz mouse(yes you can see it lag only if your mouse is like that) to ordinary 100-200hz.
You can check your mouse here: