it was an OEM copy with the same volume name as the one you have, it should work. However, I'd do one thing first if you could. Get the full SP2 or SP3 package from MS and download "Autostreamer" or an equivalent slipstreaming utility and convert that SP1 to a later version. This will save time doing updates and remove some vulnerabilities when you first connect to the internet. As well, make you get all the necessary drivers for the machine beginning with the motherboard. Good luck.