Product Key Number for Windows 7 - Find and See

I'll try to be brief. I purchased a replacement hard drive with win7 pro32 bit preloded for my panasonic cf-30. it worked fine and activated. The cf-30 died and i purchased a replacement computer that came with win64pro on it. I ended up upgrading to win 10 with the 64 bit hard drive. When I put the 32 bit hard drive in it it wanted to reactivate and told me it expired. I accidentally changed the product key in the 32 bit version to the product key from the 64 bit version that had already been upgraded to win10. I've tried various key retrieval methods but all give the key that I accidentally changed to. Is there a way to revert to the original installed 32bit product key I had, or is there a way to retrieve the original key from the 32 bit version. I'd like to keep the 2 separate hard drives with the 2 different activations, product keys. Any help would be appreciated. Thanks

Hello thanks for the response. I realize it can be used to activate 32 and 64 win 7. I was under the understanding the 64 bit version that I upgraded to win10 is related to the win7 activation. I had worries that MS would remove the activation for the win7 product key because of the upgrade to win10. The product key was valid on the win7 32bit before, and it was a different product key than the win64. So basically I used to have 2 product keys on 2 different hard drives for the same computer. I would like to recover the product key that was on the 32 bit hard drive before I accidentally changed it. Is there any way to recover that product key? Is the previous product key stored somewhere on the hard drive? or is there a way to tell windows to use the original product key before I changed it?

Unfortunately, It was not the 32bit that I upgraded. It was the 64bit i moved to win10. The 64bit version had many problems with my laptop but the 32 bit worked fine. The 64bit win10 activated and seems to work quite well.
I think it asked me to re-activate the 32 bit because i had replaced the laptop with a same version laptop. I'm not sure what I was thinking when I changed the product key. I did not need to do that but that was the mistake. I accidentally changed the product key. I want to try to find the original product key attached to the 32bit hard drive.

I looked in windows32 bit drive but could not find windows.old. Likely because i did not change or update anything on this drive but the product key.
Is there anywhere or any way to get the key that was originally used to install win7 32 bit on to the drive?

Thanks again.

Brink said:

Hello Mike, and welcome to Seven Forums. :)


Currently, the Microsoft link below is the only official location to get a Windows 7 ISO.

Microsoft Software Recovery

Thank you for your contribute..

Why my product key is not recognised in this site? (my W7 is genuine)