I have around 5-8 computres in HOME USE using the same COA, I never use it for businses, just home... I was told that this was OK as long as this was not used for business... Is that correct?
" For Installation and use on one computer ( see License Agreement for License terms )
you must accept the enclosed License Agreement before you can use this product. If you do not accept the terms of the License agreement, you should promptly return the product for a refund. To review the License Agreement go to www.microsoft.com/windowsxp/eula. etc etc etc "
there is a lot more such as if you have Windows XP Upgrade version you must stop using the version of windows you are upgrading from
you can boot with a upgrade disk as long a you have a CD of the windows version you are upgrading from or you can have it installed already and you wont need the CD.
But as per M$ you can only upgrade one COA with any single upgrade COA and once Upgraded you are no allowed to use the earlier version anymore.