Open the Settings app (Win+I keyboard shortcut) and click the 'Devices' category on the homepage. Turning it off – or on, if it’s disabled and you want to use it – is a simple button click.
Inactive window scrolling resolves this issue but isn't necessarily for everyone – some users may find it confusing if they have difficulty tracking onscreen content or using a mouse precisely. Previously, scrolling a background window required you to switch to it, perform the scroll, and switch back again, adding two cumbersome steps to your workflow. Inactive window scrolling simplifies the Windows desktop experience and addresses a longstanding usability complaint. Named Inactive Window Scrolling, it enables you to scroll the contents of inactive windows by hovering your cursor and using the scroll wheel. Windows 10 added a new convenience feature to make it easier to interact with background windows.
