Windows 10: Win 10 Activation Key

I have dell Inspiron win 7 was preinstalled in 2015 I took the free update to WIN 10 created a iso on a new dvd the original drive crashed in a few months I lost the recovery data from the original disk however DELL service center installed WIN 7 on the new drive and using the dvd installed the win 10 last night the OS crashed for some unknown reason and the DVD now does not work How do I restore my activation KEY to the new setup ?

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windows 10 key

Thanks but I don't want to do any decrypting. I want to download a Win 10 ISO from Microsoft and install it using my Win 8 key. No other steps required. Is that possible?

 

Important W10 activation key questions left unanswered by Microsoft

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My experience with TechNet keys is they can be installed and activated on more then 1 pc at a time. Windows 10 has screwed this up for me. I put Windows 7 Home Premium (Technet key) on a bare hdd in my main rig. I activated it and then upgraded it to Windows 10 Home. I got the Win 10 key with Magic jellybean and then did a format and clean install a couple of times to make sure it's all good. The main rig is activated and doing fine.

So I put a bare hdd in another pc here and installed Windows 7 HP with the same TechNet key. Guess what? IT WILL NOT ACTIVATE Win 7 now on that pc. It may or may not activate Win 7 again on my main rig. *Wtf :wtf:

I am aware that Win 7/8 Home upgrades to Win 10 Home in oem form, but beware! It appears MS does gimp the TechNet keys from a retail to oem configuration if you upgrade it to Win 10. I didn't expect to get my Win 10 upgrade to activate on any other rig then my main rig (I did try, it didn't work), but I didn't expect it to gimp the Win 7 TechNet key, but it did. *Cry :cry:

 

Important W10 activation key questions left unanswered by Microsoft

magic jellybean won't help you. The key is a generic key and the HWID is logged at microsofts activation servers, making your mobo your activation key, not your serial. You CAN'T just move the install, at least not without contacting support with a legit RETAIL windows 7/8 license.