Windows Activation error code 0x803FABB8 is one of the numerous activation errors you may encounter after you change hardware (like processor, motherboard, or disk ...

Fix Error 0xC004C003, 0xC004C003, The activation server determined the specified product key is blocked, on Windows 11/10, by following this guide.

The very first thing that you need to do when trying to fix activation error code 0xc004f063 is to run the automated Windows Activation Troubleshooter.

Mystery bug is telling Windows 10 users that their legitimate license is no longer activated. Microsoft is working on a fix.

Here are a few more answers to some nagging questions about Windows 10 upgrades and activation in the post-Anniversary-Update era.