Recently my installation of Creo academic started bogging down when in sketcher. It repaints lines very slowly, and is, in general, so bogged down as to be useless. This may have happened after a Windows update - I'm not sure. I can spin/pan/zoom just fine, which I wouldn't expect if it were an issue with graphics hardware. I upgraded to Creo 7, and the problem persists. I re-installed Windows 10, and then re-installed Creo 7, but the problem is still there.
Thanks. That worked . . . eventually. I had to do it a couple of times before it "took." I rolled back the most recent operating system upgrade, re-installed the drivers, then re-installed the upgrade. Somewhere amidst all the flailing about, the problem got corrected.