XP OEM version: May be installed on only one computer. It can't be installed on another computer even after removing it from the first computer.
XP RETAIL version: May be installed on only one computer at a time. May be installed on another computer if removed from the first computer.
XP activation is tied to a computer's hardware profile:
Bottom line: Unless you purchase multiple licenses, there is no legal sharing of the XP disc.
can anyone tell me how many legal uses you can get out of a new Windows XP Home disc? i'm considering going in with a few friends to buy one but i want to know how many uses you can get out of one disc before i put my money in.