
Fixing Windows Activation Error 0xC004C003
Error 0xC004C003 is a Windows activation issue that occurs when the end user attempts to activate Windows 10 after installation. If you’re a Windows 7/8/8.1 user, then Windows 10 is made available as a free upgrade. End users that upgrade from an older version of Windows are less likely to face this activation error, but they aren’t totally exempt from it.