Looks like they have abandoned Windows 2000. IE7 can only run on XP and 2003. I just hope my service provider doesn't do something stupid like making its login page IE7 only. That happened when MS switched from IE5 to IE6. When I logged in on IE5, it just logged me out. It wasn't until I asked the ISP that they told me I needed IE6 to get it to work. Of course, I had to connect to the internet to get IE6 so I switched to Mozilla and have been using it ever since. It is supported on all OSs and for what I'm doing it is absolutely fine.
I wonder if they've fixed the installation problem: the one that asks which disk you wish to install it on. You specify D because you know that D has tons of space and C has very little space. It then tells you that it can't install because there is insufficient space on C. If they've made up their mind to install on C, why ask?