Can I do a clean install from the Windows 7 upgrade disk? I did that with the Windows XP upgrade disk. It just asked me to put in the Windows 98 disk and product key to verify I had the software. As for purchasing the Windows 7 OEM version, I'd rather not because I swap components (mobos) every couple years and I would rather not risk MS not granting activation.
Yes -- In fact you have to when upgrading fro XP -- it only supports in place upgrades from VISTA so if upgrading from XP you have to select the custom install in Setup.Here is a good guide published by MS that details the process !