I had the same problem with my Dell, which is also ancient. I tried to uninstall/reinstall the drivers, and nothing worked. I saw on another forum that the ati2dvag infinite loop problem might be caused by overheating, so I opened my case, removed my video card, and cleaned up the onboard fan. I also moved my wireless card down a few slots to allow for better airflow to my video card, just in case. I've now been running for 3 days without a crash, after a week of crashing every 5 to 10 mins. In my case, at least, overheating seemed to have been the problem.