I have installed Windows 7 over Windows Vista. The Windows 7 setup has moved the previous (Windows Vista) installation in a folder Windows.old. Now I want to remove Windows 7 and get back Windows Vista. How can I do that?
There is a Microsoft Help and Support article on how to do this. Read it carefully before attempting it. Best to also backup the hard drive in case something goes wrong.
As far as I know, the Windows.old folder only keeps some of your files (e.g. the ones your system thinks are important). So, it is not possible to switch back to that. Also I don't understand why you want to do that, windows 7 and vista are pretty much the same, but 7 has less flaws.