I need help getting Unity on the PC

I have a question. I have been working on a game, and I'm working on it on a different cpu, but that's at my freind's house. When I downloaded it and did all the stuff I needed to do, I got it but at home I have Windows Vista, and when I downloaded it and I got to the internet activation it just keeps loading and loading. So really I'm asking does Unity work on Vista?

This is a problem with the Unity Activation, not with Windows Vista.

Go back to the license screen, and choose manual activation. This will take you to the Unity website, where you can then obtain a license. (note: do NOT cancel the page loading when the Unity website is loading)

If you have any further problems, contact Unity support at support@unity3d.com.