According to the license, OEM software can only be sold with hardware. It's meant to be sold with a complete system, or at least most of one. Now, computer stores will bend that, or consider it to be sold with hardware that the same customer didn't buy...that doesn't change that the actual license stipulates that it's to be sold with hardware.
Basically I think with OEM your only allowed to run it on one system. IF you tried to put it on 2 systems it would fail.
No, that's activation, which the retail and OEM copies will both have. Volume licensing won't (at least with XP).
[quote:2wa9pq8u]It make no sense to get a OEM and have your system crash a week later and not be able to use it on a newer system. Thats basically 150$ on dead software and thus putting you at -300# loss.