Hello,
I would recommend trying to fix the stuck "WIN" key on your keyboard first. You can try cleaning the key or replacing the keyboard altogether. Once you've fixed the key, try using the affected applications again to see if the scrolling issue has been resolved.
If the issue persists even after fixing the keyboard, you can try updating the drivers for your mouse and keyboard. You can do this by going to the Device Manager, finding your mouse and keyboard, right-clicking on them, and selecting "Update driver."
Or you can try to boot into safe mode to see if the issue persists.
Press F8 when booting the system. Advanced options>>Startup Settings>>Enable safe mode.
Best Regards,
Hania