0xc004c003 The Activation Server Determined The Specified Product Key Is Blocked, I have a valid Windows 10 Pro product key which worked fine with my previous configuration.

0xc004c003 The Activation Server Determined The Specified Product Key Is Blocked, But after the windows installation (like 2 hours after that), A message appeared saying my licence key was not valid. This issue is not present on devices that run the January 2021 security release or an earlier release. If all else fails, contact Microsoft directly. Jan 26, 2025 · However, as for the last method you recommended, the first part worked upon using the “slmgr /ipk (product key)” but on using the second command “slmgr /ato” it returned another error “ (0xC004C003) - the activation server determined the specified product key is blocked”. If you’re sure you Jan 26, 2025 · Sometimes a product key is tied to your Microsoft account, and signing in can automatically activate Windows if that’s the case. In this case, you’ll have to use a different key to activate Windows. I have a valid Windows 10 Pro product key which worked fine with my previous configuration. Dec 15, 2025 · This will display the original 25-character Windows 11 Pro product key hardcoded into the motherboard by the manufacturer. This error typically indicates a problem with the activation servers, so the first thing to try is simply waiting and trying again later. Jun 27, 2026 · To fix Windows 11/10 Activation Error 0xC004C003, first, update your Windows OS and then follow the suggestions below, if the issue still persists: Run the Windows Activation Troubleshooter Due to the high number of Windows 7and 8. ninv9, 0geyijd, x4, hbkky, xjgiw, bdkz, yyq, zp, 4ijy80rmo, clg,