So, I tried installing NOD32 Antivirus. This might have been mistake number one. After I restarted, it gave me an error about something32.dll. My computer said I had to shut down in one minute. I started up today, took 5+ minutes on the logon screen where it says "Windows Starting Up". Then, after a good 5 minutes my desktop loads. I uninstall NOD32. I try open IE, nothing. I can open other explorer windows (My Documents, etc.) but if I try to go to the Internet from there, it just freezes. So, then my McAfee AV, says I don't have enough disk space or memory for it to run. I run AVG, yes I was going to uninstall some AVs after I got NOD32 working, AVG free finds no viruses. I try running System Restore and it says it cannot protect my computer. I have 512 mb RAM, and about 26.1 gigs left on my hdd. Most of my programs are telling me I am low on memory. NOTHING is running. What should I do? Just format and reinstall Windows?