I haven't used AR on SP4 in a while. Maybe it has something to do with Windows 10 Pro last major update, now I notice AR has a significant lag that makes it impossible to draw short quick strokes . Very short strokes don't get registered at all, because the stroke ends before it can be registered. The lag persists regardless paintings resolution. The lag only occurs in AR 5. No lag in Sketchbook Pro 7, Photoshop CS6. Please advise.