Hi, I had that issue with my photoshop, it was because that pop up virus I got on my computer, it did something to my key board and my tablet so they started to glitch. So I removed all the Adobe products I had on my computer, all key board drivers and tablet drivers. Then I killed the virus(that's a whole journey, if you have that specific one, i'll tell how to get rid of it). Then I downloaded all adobes again(from adobe.com), the tablet driver, keyboard and mouse windows add automatically. Now I have only one problem, sometimes one click by the pen turns in two. But I thing thzt's because my poor old bamboo needs to be changed. Hope this helped somehow, have a good day.