8.1 from Microsoft: is it an ISO or will it install on top of 7?

[Eyeball Kid]

I'm thinking of getting 8.1 from MS directly. When I purchase and download, is it an ISO file I can install to a flash drive for a clean install, or will it force the upgrade on top of my 7 install?

 

[evilsofa]

During the install process, you can choose to "Install by creating media", and if you do that, you get the choice of making a USB stick or getting an ISO file for a DVD:

http://windows.microsoft.com/en-us/windows-8/upgrade-from-windows-7-tutorial

 

[munkle]

Nifty going to try this out, I recently had to restore to a windows 7 backup because the newest 8.1 update messed up media center that it wouldn't play the drm files.