After upgrading Win10, the system always prompts the license to expire. What should I do?

The Win10 system has been released for more than a year. With the improvement of the system, more and more users have upgraded to the Win10 operating system. However, some users have not been activated after upgrading to the Win10 system. After a while, the system will prompt that the license has expired. Even if some users are activated, they also have problems with the license being expired. In the face of license expiration, how can we solve it? The method is very simple, we just have to activate it again. Let's take a look at the specific operation method.

follows:

1, if you are using KMS activation mode of Windows 10, KMS authorize a time-limited sales and not for home users need to re-activate Windows10.

2. If you have not modified the system yourself when you purchased your computer, please contact your computer vendor or manufacturer.

3. If you purchased a computer with a genuine Windows 7, Windows 8, or Windows 8.1 operating system pre-installed, do the following:

You need to restore the pre-installed genuine Windows operating system. If you do not have a restore or installation media for your operating system, please contact your computer manufacturer for availability. If you are pre-installed with the Windows 8 operating system, you will need to upgrade to Windows 8.1 first.

4. If you purchased a computer without a pre-installed genuine Windows operating system, you can only purchase a Windows 10 license for a fee, which can be purchased from Microsoft China Mall.

The above is the solution that the system has been reminding that the license has expired after upgrading the Win10 system. There may be an individual model that cannot activate the Win10 system using the activation tool. If you do not want to pay for it, you can install it on the Win7 or Win8.1 system and then upgrade to the Win10 system.