Despite safely using 7.0 for years, when I updated to 8.1, my computer slowed to a snail's pace and froze frequently, more than hourly. I have definitely traced the problem to Adobe Reader 8.1 (8.1.2?)because the problems disappeared the several times I uninstalled it. I am now using 7.0 without any problems. Does any one have an idea what the problem is? Can I ever safely upgrade to Version 8?