If you are using Windows 10 operating system you are likely to know that they have been upgraded to Microsoft October 2018 Update was cost-efficient enough to bring this number of users "wise". Also the last error associated with activation key was not innocent, as a significant number of users noticed after they were informed that the Windows 10 operating system was no longer activated. Often, the update has changed the version of Windows 10 (for example, from Professional to Home), and the license key has become invalid.
At Microsoft, they immediately recognized the error and worked for full work because they could not help users because they could not replace the license key. Finally, it turned out that this was actually a problem with an activation server and users were affected around the world and at least, according to Microsoft, the number was not high, although many experts do not agree with it. If you are also experiencing a problem with an activation key, it will be resolved soon as Microsoft has resolved all the problems associated with the activation server. All computers must be reactivated within 24 hours and the watermark on the desktop will naturally disappear.