Turn off Scroll Lock

1. If your keyboard does not have a Scroll Lock key, on your computer, go to Start > All Programs > Accessories > Ease of Access > On-Screen Keyboard.
2. When the on-screen keyboard appears on your screen, click the slk button.

Note: To close the on-screen keyboard, click the X in the upper-right corner of the on-screen keyboard.

Source:

https://support.microsoft.com/en-us/office/turn-off-scroll-lock-a78492cc-c124-4782-a38b-df46669520e0