For those of you who are planning on buying Windows 7, you may want to read this if you want to get Final Fantasy VII to work on it.
First of all, Windows 7 does not have the TrueMotion 2.0 codec, which is used to run the in-game movies. Without this, you will not be able to start the game because the game can't play the Eidos Interactive Presents movie. To download the codec, visit this site:http://codec.alshow.co.kr/Page/en/true.htm
Next, you'll need patches, although this is well known in the entire Final Fantasy VII gaming community. The best site to get the patches is:http://www.ff7-universe.com/
(click downloads on the left and get the 1.02 patch, the chocobo patch, and the mini games patcher. First install the 1.02 patch, then the chocobo patch, and then the mini games patcher in that exact order).
Last, the save files located in the default directory C:\Program Files (x86)\Square Soft, Inc\Final Fantasy VII\save will not be changed when you save in-game unless you run Final Fantasy VII as an administrator. To run Final Fantasy VII as an administrator without having to constantly right click on the icon and click "Run as administrator," right click on the Final Fantasy VII icon, click "Properties" and then the "Compatibility" tab. At the bottom, you should see a checkbox next to the words "Run this program as an administrator." Check that box and from now on, every time you run Final Fantasy VII, it will run as an administrator.
Most of this is well known except the first step because that only applies to Windows 7, so I thought I should let you know. I did all this and it ran perfectly on the Windows 7 Release Candidate, meaning it should run perfectly on the Windows 7 retail version.