If you use it Windows 10 operating system You know that Microsoft is upgrading October 2018 they were very expensive because it showed that the number of users was "smart". Also, the last mistake activate the key it was not innocent because a significant number of users noticed that their Windows 10 operating system was no longer activated. Most updates have changed Windows 10 (for example, from Home to Home) and the license key was invalid.
At Microsoft, they immediately recognized the error and did their utmost because they could not help users because they could not replace the license key. Finally, this was actually a problem with the activation server and has impacted the users all over the world, and at least according to Microsoft, this number is not great, but many experts disagree. If you have a problem with the activation key, it will be resolved soon, as Microsoft has solved all issues related to the activation server. All computers need to be re-activated within 24 hours, and the water sign on the desktop is, of course, lost.