Your Windows 10 product key serves as proof that you actually own Windows 10, and might need to be entered when you reinstall ...

If your Windows 10 product key is not working on Windows 11, check the Windows Edition, your activation status, and then ...

When Microsoft first launched the Windows operating system, installing it was only a matter of copying the program onto a disk. You didn't have to verify your copy of Windows. Starting with Windows XP ...

Lost your Windows 7 product key? Use this quick guide to recover it from stickers, emails, tools, or Microsoft Support.

Microsoft no longer supports Windows 8.1. If you're still running it on your PC, you're long overdue for an upgrade. Lance is an experienced writer who tries to unravel the mysteries of personal tech.