Brian Freeman found a flaw in my article Reinstall Windows when you’ve lost your reinstall disc or partition. I told readers that “when it comes time to activate Windows, use the activation number on ...

If you plan to install a new copy of the Windows operating system on a PC in your office, you'll need to prove your ownership of the software. In the past, this simply meant entering a unique product ...

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 ...

Microsoft confirmed that the company is aware of activation issues on some systems. The problem appeared shortly after Microsoft blocked old Windows 7 and 8 keys from activating Windows 10 and 11.

If you have encountered 0x87e107f9 Windows 11/10 Activation Error on your device, you can try our recommended solutions below in no particular order to resolve the ...