Windows 10: When i hold down middle mouse, and move the cursor it scrolls, How do I fix this problem...

this is making middle mouse button useless in fusion 360 among other applications because it zooms out randomly due to windows interpeting me holding middle mouse and moving the cursor as me wanting to scroll, and it is annoying in browsers when I middle click to open a link in a new tab only to start scrolling randomly. I want to use the scroll wheel to scroll and the middle mouse button as a separate function. This has been a recent issue.

:)

 

Mouse cursor becomes tiny when clicking middle mouse button

Setup:

• High PPI monitor (4K resolution, 15 inches), scaling set to 250%
• Windows 10
• Microsoft Intellimouse Explorer 3.0 mouse
• "Windows Black (large)" cursor scheme

Whenever I click the middle mouse button on my Intellimouse the mouse cursor suddenly becomes tiny. This problem can be temporarily resolved by opening Mouse Properties and changing the Cursor Scheme.

Is there a permanent solution to my problem?

This is mouse cursor at normal size:





And this is the same cursor after I click the middle mouse button:





(The screenshots will naturally be very large as they're taken on a high PPI monitor.)

 

scrolling bad

New event. When placing cursor over a list or row of columns, even the volume bar scrolling is automatic and proceeds to one end of the series and stops. The scrolling also stops when I move the cursor away from the list but am unable to select anything in the list. Not all the possible lists are effected. Other sites have recommended mouse/kb fixes. Have tried all those but the phenomena persists. Have not had any known updates recently and don't have a restore point to try. Any other suggestions? W10Pro 1903

 

Middle mouse scrolling maximum speed

I'm doing a lot of Excel work at the moment so need to be able to scroll efficiently vertically and horizontally. I find the speed of the middle mouse hold scrolling really frustrating, since it goes very slow then immediately jumps to insanely fast and
I'm down at row 20000. Is there a way to change the maximum speed of this type of scrolling?

Thanks