Every time I load a web brower, the program crashes (IE, Firefox, Chrome, the browser in WM11....everything). Same thing if I try to update Avast and Malwarebytes. I did a manual avast update, no virus' found, same problems. I get DEP errors for all of these programs, and I still get them when I try to set exceptions for them. The internet stays connected.
At the same time, Nero Backitup constantly runs and crashes, and does not stop, prompting the "Nero Backitup has stopped working" window and a DEP balloon to continually appear (if I close the dialog box).
Anyone have anything else they could suggest before I reinstall Vista? No restore points available, and I hadn't installed anything new when I started getting the errors a couple days ago. Upgrading to Service Pack 2 (windows update still works fine as well) did not help. Neither did going in to safe mode. Or shutting down every non-essential process I could click on.