Windows 10: how can i restore my previous product key

I have changed my Windows 10 product key accidentally while experimenting, on this key windows isn't activated.

I want to restore to my previous Product key which I had lost, is there any way to restore previous product key to activate my laptop's windows.

i have a digital license of previous version.

:)

 

How i can restore my previous product key

I have changed my Windows 10 product key accidently while experimenting, on this key windows isn't activated.

I want to restore to my previous Product key which I had lost, is there any way to restore previous product key to activate my laptop's windows

 

How to restore a text document to its previous form?

Have you tried saving a new document not following the same steps you did prior to this concern? If so, did you experience the same issue?

In the meantime, kindly follow the steps below:

• Right-click on the text document.
• Choose Restore previous versions.
• Go to Previous Versions tab.
• Look for the previous version of the document.
• Choose Open or Restore.
• Click on Apply.

The steps will allow you to browse all previous versions of the document.

Reply to us with the information, so that we can assist you better.

 

"All your files are right where you left them"...yeah, but where are my product keys?!

Hi,

Thank you for posting in Microsoft Community.

I understand the inconvenience you are facing in Windows. We will help you.

• As you have mentioned that you are unable to access the Microsoft Office 2010 application after the update in Windows 10. As it would be purchased previously, I would suggest you to login to office 365 site and you could still download the application if
  it has been already purchased.

• If it was a pirated version then I would suggest you to contact the support team and purchase the keys and activate the Microsoft office 2010.

Refer: Choose your Office

If these options are not helping you then I would suggest you to refer the below steps and check if it helps.

I would suggest you to perform a system restore.

System restore will take your computer to pervious state when it was not facing such problem, this can be done by selecting the proper restore point.

To restore the operating system to an earlier point in time, follow these steps:

• Press Windows key + R.
  
• Type rstrui.exe and click
  OK.
• Follow the onscreen instructions to complete the System restore process.

Disclaimer: When you use System Restore to restore the computer to a previous state, programs and updates that you installed after that date are removed.

Reference: Restore from a system restore point &
Create a system restore point

Hope this helps. Keep us posted to help you better.