Is the mouse you are using a gaming mouse with very high DPI \ polling rate? If so, and you disable the software for it, or lower the DPI \ polling rate, does it still happen? Does it happen with a standard mouse if you have one available?
Stardock Support Manager
While the mouse I have is a gaming mouse, I got it purely for the shape/feel and don't use any of the extra software that came with it. It does have a DPI changing switch on the mouse but I don't have it set to crazy high (like most gamers) I just have it set to default settings. I had to actually open the software that came with it to check its settings.
Polling Rate was at 1000 so I dropped it to 125 will test to see if it fixes issues, my DPI is at 2000 any slower and it will be too slow.
I have tested with a few other mice including a standard dell mouse and issue still occurred.