Windows 10: I want to activate windows 7 but I lost my product key?

I am trying to activate Windows 7 which I had to reload after a computer failure. I have an old product key that says is not active. So how can I get it activated?

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Lost Windows Activation Product Key

I recently lost my Windows 10 pro Activation product key and now Microsoft wants me to activate my windows but now i dnt have any product key please suggest me the way i dnt want to lost my all data...

 

Activate windows 10 after re-installing (I have lost my product key)

I own a Lenovo T430 laptop. In 2017, I installed Windows 10 using my original Windows 7 product key. Unfortunately, I cannot find that product key anymore. I need to re-install windows 10. Will it be automatically activated after the installation, if I skip the step of asking the product key during the installation?

In my opinion, I believe that my laptop will have a digital entitlement stored on the Microsoft Activation Servers and this will not be a problem. Is that true?

If not, please suggest me a solution or a workaround.

 

Lost Activation Key

A Product ID does not help.

There is no public list of Product Keys available.

And we have no product keys to give you.

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If you have lost it, you have to buy another Windows 7 package if you want to stay with 7, which Microsoft no longer sells.

If OEM preinstalled (Dell, HP, etc.) license:

The COA sticker, which has the Product Key on it, is either on the underside of the Laptop or in the Battery Compartment.

With a Desktop it is either on the side, rear or top of the Computer Case.



Product Key finder programs do NOT find a useable product key on OEM preinstalled operating systems (Dell, HP, etc.)

Key Finder Programs used on preinstalled Operating Systems only find the Manufacturer's Product Key which was used on multiple machines