IE 7 does not run on Windows 2000. The latest version of IE to run on Windows 2000 is IE 6. But if you are like me, you can use Firefox to surf the internet in Windows 2000 (running on Parallels 1970 on my Macbook) instead. I have not used IE myself since the release of Firefox except to access Windows Update. I use AVG AntiVirus Free on Windows 2000 and Windows XP.