Hello, I am using Autocad Lt 2016 on a Dell XPS with Windows 7. It was working fine up until a few weeks ago when it started running really slowly. I am not sure how best to describe it, but it is effecting the performance of all my drawing files. When I try to do anything (draw lines, trimming, extending) the cursor is really slow to snap to a point. It flickers all over the place and I have to spend ages trying to get it to snap. Any ideas ?