New
#11
Yeah, I re-read and you said you bought OEM version... as in you bought from an online retailer such as newegg.com? It should work.... put it in with new mobo and try... if it doesnt recognize new mobo and other parts, reinstall OS on top of itself (into existing directory).
If you bought the upgrade disc then you can still install on top, or perform a clean install (even with upgrade DVD).
Doing a Clean Install with a Upgrade Windows 7 Version
If you do call MS... tell them you built 1st system and had a mobo crash and need to reinstall for new mobo and other parts.