You cannot use a Dell disk on a non Dell computer. The Disk is OEM and is tied to the computer it was installed on. 
Wondering if it is just me or if this is correct.  I have been able to install the OS on different machines, and the Microsoft authentication program says it is Genuine Microsoft Software.  It never asked for the authentication number on install. How is it the authenticated on other non-Dell machines?  Thanks!
Does Dell Windows Vista Home Premium 64 Bit SP1 Require authenication on 
another computer?