Hello, since I install the Update 1 on my Windows 8.1 PCs, I have a bug with mouse with all of them wich have dual screen. If I move my mouse normaly (not fast) to go to an other screen, it is blocked on the border of the screen where it was (and don't go to other screen). To go to an other screen, I must move the mouse very fast and it's very anoying. The problem appears when I open one Modern UI app. If, after boot, I don't open any Modern UI app, I don't have this bug but If I open one, the bug appears and it still present even if I close all Modern UI apps. I have 3 PCs with dual screen, all have this bug and this bug isn't present on Windows 8.0 and 8.1 without Update 1. So my question is : what I can do to remove it ? This is really a bug or a "feature" ? I can't work correctly with this ! I have spent lots of time on the net to search how to fix it but I found nothing.... On all of this PCs, I only have put OldNewExplorer, Big Muscle aero glass mod and Classic shell but this problem appears also with a clean Windows 8.1 Update 1 install if I use more than 1 screen... Cheers.