I'm using virtual box 5.0.14 and I've installing guest additions and the extension pack. I am able to scroll up/down however frequently as I'm scrolling down it scrolls up instead. If I disable mouse integration the problem stops however the mouse pointer does not feel very smooth compared to using mouse integration. Any idea what the problem could be?
Had the same problem. Seems it is the problem of virtual box. I found this article: https://forums.virtualbox.org/viewtopic.php?f=6&t=68702 Followed suggested decision and it helped. So eject guest additions, insert again and reinstall. Should help.