I have a number of PCs, and do not want to redownload the upgrade for each of them so I am upgrading from the OSI. My product key is from an OEM installation of 8.1 pro and I have no copy of what my individual key is, or if it exists. The key I used was the one in the system, but it is not being recognised as a valid key. How do I find my valid key?

Whatwall

On Sun, 16 Aug 2015 05:21:28 +0000, whatwall wrote:

I have a number of PCs, and do not want to redownload the upgrade for each of them so I am upgrading from the OSI. My product key is from an OEM installation of 8.1 pro and I have no copy of what my individual key is, or if it exists. The key I used was the one in the system, but it is not being recognised as a valid key. How do I find my valid key?

You can upgrade from the ISO, however, you cannot do so by booting from the
ISO (neither from a burned DVD, nor from a USB stick to which you've copied
the contents of the ISO). In order to upgrade by using the ISO, you need to
mount the ISO in Windows (just click the ISO and it will be mounted) and
then run setup.exe from the ISO. You won't be prompted for