Windows 10: Lost digital product and activation (Windows 10 Pro

I was on Free upgrade of Windows 10 Pro. My compute crashed and I lost all information on my PC as I had to format the hard drive. Now I cannot reload Windows 10 Pro because I don't have product and activation key. I downloaded Windows 10 Pro from Microsoft website with the running this beautiful system. It needs product key. What do I do

:)

 

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.

 

How to find the product key for my Windows 10 pro

Hi,

Once you upgraded to a higher version of Windows 10, you will have a digital entitlement that let's you upgrade from Windows 10 Home to Window Pro.

Below are the scenarios and series of troubleshooting steps you can do to activate your Windows 10 Pro:

• If your new device is currently running on Windows 10 Home, select
  Go to Microsoft Store and you'll be prompted to upgrade to Windows 10 Pro for free.
• If you have a digital license for Windows 10 Pro, but Windows 10 Home isn't activated on your device, select
  Troubleshoot, and then follow the steps to upgrade to Windows 10 Pro.
• If you don't have a digital license for Windows 10 Pro, Windows 10 Pro is available for purchase from the Microsoft Store.

Let us know if you need further assistance.

 

Lost Windows 10 product key/malware detected

Sounds like Ransomware/Identity Theft to me.

The free Windows 10 does not come with a Product Key.

Activation in Windows 10

•  Email
  
•  Print
  

Activation helps verify that your copy of Windows is genuine and hasn’t been used on more devices than the Microsoft Software License Terms allow. Depending on how you got your copy of Windows 10, activation will use either a digital license or a
25-character product key.

Digital license (called a digital entitlement in Windows 10 Version 1511) is a method of activation in Windows 10 that doesn't require you to enter a product key.

How you got Windows 10
Activation method

You upgraded to Windows 10 for free from an eligible device running a genuine copy of Windows 7 or Windows 8.1.
Digital license

I would suggest he use "Factory Reset/Install" to clean out the Trojan/Ransomware and then reinstall Windows. In the end this will be quicker than all these other processes.