The following lines were added (+) and removed (-):
Windows includes a process known as "Windows Activation." This process activates your copy of Windows with Microsoft, and they check to make sure it’s a properly licensed copy. It ensures your Windows license key is only being used on a single PC at a time and that thousands of PCs aren’t using the same key. Windows also regularly checks to ensure that your key hasn’t been reported as pirated. This occurs when your computer tries to download optional updates from Microsoft.When you’re using a non-genuine copy of Windows, you’ll see a notification once every hour. The notification informs you it’s non-genuine and that you need to activate. Your desktop background will become black every hour — even if you change it, it’ll change back. There are also other limitations and annoyances.If you do actually have a valid Windows key, you can change the product key in Windows. Windows will then activate with Microsoft and remove the limitations.