Not quite.don montalvo said:if you have an oem copy, it's probably not a good idea to try to use it in parallels. piracy concerns aside, don't oem versions of windows come with specific added/removed drivers for the hardware it's bundled with?
Even reputable dealers will sell you a generic "OEM" version of Windows along with a "qualifying hardware purchase" such as an internal hard disc drive, for about a third of the price of a "retail box" - there are some extra terms and conditions, such as the license being non-transferrable beyond the system on which it was intitially installed.
If you want to know whether using this under boot camp is legitimate ask a lawyer, (if you flog the "qualifying" hardware on eBay and keep the windows, probably not - but if you do actually fit the hardware in the computer running windows it seems eminently reasonable) but there are no technical limitations. However, yes, its probably a bad idea to use such an OEM copy under Parallels if only because of the ease with which the "hardware" can change.