Windows Vista is an operating system. It is the latest in Microsofts' series of windows operating systems.
There is no rollback way to do it. You would need to reinstall XP fresh over the Vista install. Why do you want to do that anyway, is Vista not working for you?
Windows Vista uses the standard Win32 libraries (or Win64 on x64 edition which is reverse-compatible anyway) so what runs on older Windows should run OK on Windows Vista unless it is something specific like a professional application. If you have trouble playing Generals on Vista, Vista has a compatibility mode.
That edition of Windows Vista does not exist. Windows Vista exists in two editions for home users: Windows Vista Home Basic and Windows Vista Home Premium.
You should be able to as it will to it anyway. If there is no start up then just insert it into the XP OS and start from there.
No your windows 7 will not deleted
No. Obviously, if you upgrade to Windows Vista, you will have Windows Vista.
No.
Windows Vista is not an option for the iPhone.
what do you mean from windows vista x64 to windows vista? they are both the same thing. there is win32 and win64. so i don't know what you mean by that
Windows Vista games are games that belong to Windows Vista, which can be accessed through their Windows Vista software. You can easily download free games onto your computer.
http://www.microsoft.com/windows/windows-vista/compare-editions/default.aspx
windows vista ultimate since it has al that vista offers