Severe Windows 10 Mouse Lag

Thanks for reply. No, in macOS everything is brilliant. In Windows 10 it's pretty horrible and absolutely random.

Bluetooth coexistence/collaboration was the first thing I tried. And I am not using wi-fi on this machine, it uses Ethernet cable. I even tried disabling wireless adapter in device manager.

We actually spoke in different topic on this forum about same issue. Topic just went closed.

I've gone through all kinds of router manipulations and the fact that I can't find much people like me and the fact that it happens only in Windows 10 and only with mouse (not keyboard) making case very strange.

Just tested $3 USB-mouse. No issues with it. Also, in device manager, Bluetooth radio itself had this "allow to turn off" thing disabled by default. I unchecked it on mouse and keyboard as well, but it had no effect.

As for connected devices, mouse lags even if nothing is connected.

I tried that numerous times. If you unpair mouse in Windows it will never pair again. It will say "Try connecting again" or something like that. The only way to pair mouse is to do so in macOS and then, after reboot it will appear in Windows. I believe it's they way it is on newest Macs.

Ultimately I cannot pair mouse in Windows. I click on button to add a Bluetooth device in settings, choosing category where it says about manipulation devices etc., and when I select mouse in the list it fails to connect to it.

Okay. I narrowed problem to Apple Wireless Mouse driver. If I uninstall it, no lag whole day, but no scrolling as well as you might imagine.

I tried drivers from Boot Camp 5.1 and 6.0 with no luck. They won't fit. Also tried Magic Utilities (like third party app), but they use same latest driver that lags. Any Ideas?

Tried.

No, it didn't. I tried older drivers from Boot Camp 6.0 also, but they don't fit since the hardware was refreshed it sees.