I managed to screw up my computer. No clue how this happened. Virus? Worm? Me being stupid? For days, the computer would freeze up...usually in the middle of something I felt was important. The only "fix" was to unplug it. I tried the few limited tricks up my sleeve that had worked in the past. Nothing. In the end, I reformatted. I can now access the Internet. But it's not the same. What have I done?