you might get away with it but oem software is tied to the original computer and can never be transferred to another. I have seen too many cases where users have gotten away with violating microsofts eula by transferring their oem os or reuse an os that justified an upgrade but months later get declared non-genuine. You never know when microsoft will make changes to their genuine test in order to catch cheaters.
It is amazing the number of users in the different forums getting help who were trying to upgrade to win10 but finding out their os is not genuine. In some cases they were unaware what they did was not legit.
I have a functioning retail version of Windows 7 on one internal drive and the original corrupted version of W7 on a second drive. I was thinking of doing a clean install of W10 on the second drive from an ISO, after formatting the drive, to enable a check on the compatibility of various programs and hardware. I assume that I wouldn't be able to validate the W10 version on the same machine but I would use this set-up to enable a decision on which OS to go for.
Is this feasible?

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