Many Windows 10 users have discovered that their machine’s Windows installation has been deactivated, and a number of them have messaged me asking what’s going on.
In a nutshell, Microsoft is experiencing an issue with their Activation servers that’s causing some Windows 10 installations to lose their “Activated” status.
Whenever you visit a secure website, the data flowing between your web browser and the site’s server is encrypted (converted into code that is very difficult to understand and use without having the decryption key).

If your PC is running Windows 10 and have your user account protected with a password, you are no doubt familiar with the Lock Screen.