Is it said that if you have Vista and/or Win 7 already installed on the computer, you can't install Windows XP, or else it will affect the Vista and Win 7 installation?
So what can be a proper way? Some people say remove the hard disk first, and install XP on a brand new hard drive first.
What about using some tool (can GParted do it?) to make all partitions invisible, except only 1 primary partition visible (which is an all empty partition), and then boot up the XP disc to install it? thanks.