Microsoft error code 0xc004c003 – This error can occur if the activation servers are busy.If your copy is genuine, maybe you should report this problem to Microsoft. If this happens, make sure that you have a genuine copy of Windows. 0xc004c003 product key blocked W indows 10 – This message can appear if your product key isn’t valid.Speaking of activation issues, users reported the following problems: In order to use Windows 10, it’s important to activate it, but many users reported error code 0xc004c003 while trying to activate Windows. Home › Fix › FULL FIX: Error code 0xc004c003 in Windows 10, 7
