Sorry if this has been discussed before, I searched but didn't find anything.
I've had my new Dell XPS 8500 for almost two weeks now and the last few days there's been some horrible lagging/choppiness. The mouse gets stuck, gets jerky and won't move to the top right of the screen. It comes and goes, seemingly for no reason - eg: today (Saturday) is the worst it's been since Wednesday, but it's not like I'm doing anything differently to the past two days. This is just in general Windows programs, not games (haven't tried any yet), but seems fine in the start menu. I don't know if it's the mouse itself, video card, RAM (currently 15%, according to Task Manager), CPU (1%). I've done extensive testing, diagnostics, driver updating, defragging, uninstalled unnecessary software, restore... nothing's worked. I contacted Dell's XPS designated phone support, got some remote assistance but the problem went away. Any ideas? Thanks.