[QUOTE="BGN"] [QUOTE] [QUOTE] On Sun, 18 May 2008 17:50:50 +0000 (UTC), TD Wrong. You can buy OEM software if you're "an original equipment manufacturer, or an assembler, reassembler, or installer of software on computer systems"[1] and MS reps confirm that "users may buy an OEM copy of Windows Vista at a substantial discount, provided they adhere to the terms of the license."[2] I think pretty much everyone who[/QUOTE] Which means that if at some point in the future you change your motherboard your copy of XP (or Vista) will stop working. As happened to me (twice!) when rebuilding my motherboard (and once with boot-camp - setting it up to work in parallels seems to break the OEM model as it looks like the motherboard had changed). OEM is a *lot* less flexible in licensing.[/QUOTE] That's also going to happen if you swap the mobo on a Dell or any other machine which ships with an OEM copy of windows.[/QUOTE] Bollocks, you don't even need to activate Dell OEM installs.