Jumpy scrolling with mouse wheel

All of a sudden, when I try scrolling through a web page, for every click of the mouse-wheel, it moves up or down a whole page, not smooth scrolling.

Yesterday it was still scrolling smoothly. What could have caused this and what can I do about it?

EPILOGUE: The problem disappeared somewhere after playing with scroll wheel settings, but they were already correct. I think this behaviour was perhaps just Chrome being wobbly.

Check your mouse wheel settings to make sure switch the number of scroll lines to the default 3 lines as below:

I have a ms mobile mouse 3500 that runs on its own usb dongle. After trying all sorts of actions, nothing was working. Then I unplugged the dongle and plugged it back in. Scrolling became smooth and no longer jumped multiple lines. Not sure what happened when i reboot because i may have to un-plug the dongle and re-plug each time. I remember with a very old version of ubuntu linux that this was a problem and that's what promptd me to try this with windows 10.