AllKeyMasters
TutorialsJanuary 14, 2026· 12 min min read

How to install and activate Office Professional Plus

Step-by-step guide to download, install and activate Office Professional Plus. Troubleshooting common activation errors.

Complete guide to download, install and activate your Office Professional Plus license. Step-by-step procedure valid for Office 2019, 2021 and 2024.

Prerequisites Before Installation

Minimum System Requirements

Before starting, verify that your PC meets these minimum specifications:

  • Operating System: Windows 10 or Windows 11 (64-bit recommended)
  • Processor: 1 GHz minimum, 2 cores recommended
  • RAM: 4 GB minimum, 8 GB recommended
  • Disk Space: 4 GB minimum available
  • Resolution: 1280 x 768 pixels minimum
  • Internet Connection: Required for activation and updates

Required Items

Make sure you have:

  • Your 25-character product key (format XXXXX-XXXXX-XXXXX-XXXXX-XXXXX)
  • Your Microsoft account (recommended but optional)
  • Administrator rights on your PC

⚠️ Important

Uninstall any previous version of Office (2010, 2013, 2016) before installing Office Professional Plus. Two versions cannot coexist.

Step 1: Download Office Professional Plus

Official Microsoft Method (Recommended)

To download the official Office Professional Plus ISO, Microsoft provides the Office Deployment Tool (ODT). This is the safest and most reliable method.

  1. Go to microsoft.com/download/details.aspx?id=49117
  2. Download officedeploymenttool.exe (~3 MB)
  3. Run the executable and extract files to C:\ODT
  4. Open Notepad as administrator
  5. Create a configuration.xml file with this content:
<Configuration>
  <Add OfficeClientEdition="64" Channel="PerpetualVL2021">
    <Product ID="ProPlus2021Volume" PIDKEY="YOUR-25-CHARACTER-KEY">
      <Language ID="en-us" />
      <ExcludeApp ID="Groove" />
      <ExcludeApp ID="OneDrive" />
    </Product>
  </Add>
  <Display Level="Full" AcceptEULA="TRUE" />
</Configuration>

Replace PIDKEY with your product key, then:

  1. Save the file in C:\ODT\configuration.xml
  2. Open PowerShell as administrator
  3. Execute: cd C:\ODT
  4. Launch installation: .\setup.exe /configure configuration.xml

The download starts automatically (~2 GB). Installation follows immediately. Total duration: 15-30 minutes depending on your connection.

Step 2: Install Office Professional Plus

Standard Installation Procedure

If you use ODT, installation is automatic after the setup.exe /configure command. If you use OfficeSetup.exe:

  1. Launch: Double-click on OfficeSetup.exe
  2. UAC: Accept the User Account Control prompt
  3. Download: The installer downloads files (progress bar)
  4. Installation: Applications install automatically (5-10 min)
  5. Completion: Message "You're all set"

💡 Tip

During installation, don't turn off your PC and keep the internet connection active. Interruption could corrupt the installation.

Step 3: Activate Your Office License

Manual Activation

If automatic activation fails or you haven't used ODT:

  1. Open Word
  2. Click File → Account
  3. Click "Change Product Key"
  4. Enter your 25-character key
  5. Click "Install"
  6. Wait for connection to Microsoft servers (5-30 seconds)
  7. Confirmation "Office is activated"

Troubleshooting Activation Issues

Error 0xC004F074

Cause: KMS server not found (MAK/Retail key required).

Solution:

  1. Open PowerShell as administrator
  2. Execute: cscript "C:\Program Files\Microsoft Office\Office16\OSPP.VBS" /dstatus
  3. If you see "VOLUME_KMSCLIENT", your key is KMS (incompatible with internet activation)
  4. Contact our support for a Retail key

Error 0x8007000D

Cause: Corrupted installation files.

Solution:

  1. Completely uninstall Office
  2. Download Microsoft uninstall tool (aka "SaRA")
  3. Reinstall Office with a newly downloaded installer

🚨 Beware of Illegal Keys

If your key consistently refuses activation, it may be fraudulent. Only purchase from official Microsoft resellers like AllKeyMasters.

Conclusion

Installing and activating Office Professional Plus is relatively simple if you follow the official Microsoft procedure. In case of problems, our French technical support is available 7 days a week to assist you.

Ready to buy your Office license?

Discover our Office 2019, 2021 and 2024 Professional Plus offers with instant delivery and French support included.

Related articles