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Home Centro de ajuda Installation & LicensingLicense Key Not Working? Troubleshooting Checklist

Installation & Licensing

License Key Not Working? Troubleshooting Checklist

 6 min read

The checklist for failed activations: typos, edition mismatch, already-used keys, and the exact fixes per error message.

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First checks (the most common causes)
Error messages and fixes
Volume / MAK keys
Still not working?

Products mentioned in this article

Microsoft Office 2021 Standard MAK

Microsoft Office 2021 Standard MAK

€ 29,88

Windows 10 Enterprise LTSC 2019

Windows 10 Enterprise LTSC 2019

€ 29,90

Windows 10 Enterprise 2016 LTSB MAK - 20 Users

Windows 10 Enterprise 2016 LTSB MAK - 20 Users

€ 99,00

Windows 10 Enterprise LTSC 2021 MAK - 500 Users

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Windows 10 Enterprise LTSC 2021 MAK - 500 Users

€ 279,00

Windows 10 Enterprise LTSC 2019 MAK - 500 Users

Windows 10 Enterprise LTSC 2019 MAK - 500 Users

€ 279,00

Windows 10 IoT Enterprise LTSC 2021 MAK - 500 Users

Windows 10 IoT Enterprise LTSC 2021 MAK - 500 Users

€ 279,00

Microsoft Office 2024 Standard LTSC MAK

Microsoft Office 2024 Standard LTSC MAK

€ 29,88

Microsoft Office 2024 Professional Plus MAK

Microsoft Office 2024 Professional Plus MAK

€ 29,88

Microsoft Office 2021 Professional Plus MAK

Microsoft Office 2021 Professional Plus MAK

€ 29,88

Windows 10 Pro MAK

€ 89,00

Windows 11 Pro MAK

Windows 11 Pro MAK

€ 99,00

Windows 10 Enterprise 2015 LTSB MAK - 20 Users

Windows 10 Enterprise 2015 LTSB MAK - 20 Users

€ 99,00

Microsoft Office 2019 Standard MAK

Microsoft Office 2019 Standard MAK

€ 112,17

Windows 11 Enterprise LTSC 2024 MAK

Windows 11 Enterprise LTSC 2024 MAK

€ 79,00

Microsoft Office 2019 Professional Plus MAK

Microsoft Office 2019 Professional Plus MAK

€ 384,36

Microsoft Office 2021 Professional Plus LTSC MAK

Microsoft Office 2021 Professional Plus LTSC MAK

€ 1.527,54

Windows 11 IoT Enterprise LTSC 2024 MAK

Windows 11 IoT Enterprise LTSC 2024 MAK

€ 49,00

Microsoft Office 2021 Standard LTSC MAK

Microsoft Office 2021 Standard LTSC MAK

€ 583,28

Microsoft Office 2024 Professional Plus

Microsoft Office 2024 Professional Plus

€ 49,90

Microsoft Office 2024 Standard

Microsoft Office 2024 Standard

€ 24,90

Microsoft Office 2019 Home & Student

Microsoft Office 2019 Home & Student

€ 16,99

Microsoft Office 2021 Home & Student

Microsoft Office 2021 Home & Student

€ 22,99

Microsoft Office 2021 Standard

Microsoft Office 2021 Standard

€ 24,90

Microsoft Office 2021 Professional Plus

Microsoft Office 2021 Professional Plus

€ 34,90

Microsoft Office 2024 Home & Business

Microsoft Office 2024 Home & Business

€ 24,90

Microsoft Office 2024 Home

Microsoft Office 2024 Home

€ 24,90

Microsoft Office 2019 Standard

Microsoft Office 2019 Standard

€ 19,99

Windows 11 IoT Enterprise LTSC 2024

Windows 11 IoT Enterprise LTSC 2024

€ 34,90

Windows 11 Pro N

Windows 11 Pro N

€ 29,90

Windows 11 Pro

Windows 11 Pro

€ 29,90

Microsoft Office 2024 Home & Student

Microsoft Office 2024 Home & Student

€ 59,99

Windows 10 Pro

Windows 10 Pro

€ 24,90

Windows 11 Enterprise

Windows 11 Enterprise

€ 39,90

Windows 10 Pro N

Windows 10 Pro N

€ 24,90

Windows 11 Enterprise LTSC 2024

Windows 11 Enterprise LTSC 2024

€ 49,90

Windows 10 Enterprise LTSC 2021

Windows 10 Enterprise LTSC 2021

€ 34,90

Microsoft Office 2019 Professional Plus

Microsoft Office 2019 Professional Plus

€ 29,90

Windows 11 Home

Windows 11 Home

€ 24,90

Windows 10 Home

Windows 10 Home

€ 19,90

Windows 11 Pro + Office 2024 Pro Plus BUNDLE

Windows 11 Pro + Office 2024 Pro Plus BUNDLE

€ 39,90

Windows 11 Home + Office Home 2024 BUNDLE

Windows 11 Home + Office Home 2024 BUNDLE

€ 39,90

Windows 10 Pro Workstation - 2 Users

Windows 10 Pro Workstation - 2 Users

€ 29,90

Windows 10 IoT Enterprise OEM - 5 Users

Windows 10 IoT Enterprise OEM - 5 Users

€ 139,90

Microsoft Office 2021 Home & Business

Microsoft Office 2021 Home & Business

€ 24,90

Microsoft Office 2021 Home & Business ESD

Microsoft Office 2021 Home & Business ESD

€ 24,90

Microsoft Office 2019 Home & Business

Microsoft Office 2019 Home & Business

€ 69,99