If you see the “Couldn’t install” message when installing Microsoft 365 or Office, it can be caused by storage issues, internet connection problems, or where the installer files are located.
Follow the steps below to fix the problem.
Step 1 – Move the Installer Folder to the C: Drive
After unzipping the Office installer, move the entire folder (including all files and subfolders such as the config file) to your C: drive.
Run the installer from inside that folder on the C: drive.
💡 Many customers have reported that this step alone fixed the issue.
Step 2 – Check Your Internet Connection
Make sure you’re connected to a working Wi-Fi network.
If your connection is unstable, restart your router or switch to another network.
Step 3 – Verify Free Space on C: Drive
Ensure you have enough free space on your C: drive for the Office installation.
Delete or move unnecessary files if storage is low.
Step 4 – Try Moving and Reinstalling Again
If moving to C: didn’t work:
Delete the installer folder from the C: drive.
Unzip a fresh copy of the installer in your Downloads folder.
Move the entire folder to the C: drive again and run the installation from there.
Step 5 – Use Mobile Internet (4G/5G)
Some routers can cause this installation error. Using your phone’s mobile internet can help:
On your phone, go to Settings > Mobile Hotspot (or Internet Sharing) and turn it on.
Connect your PC to the Wi-Fi network created by your phone.
Try the installation again.
💡 Many customers have reported that this step alone fixed the issue.
Step 6 – Disable Your Antivirus Temporarily
Some antivirus programs block or interfere with the Office installer. Temporarily disable your antivirus software (including Windows Defender's real-time protection), then run the installer again. You can turn protection back on once the installation finishes.
Step 7 – Delete the Office Folder Under WOW6432Node
If you're seeing Error Code: 0-2015 (2250), or none of the steps above have worked, a leftover Office key under WOW6432Node in the registry can be the cause:
Press Windows + R, type regedit, and press Enter.
Navigate to HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node.
Look for any Office folder/key inside WOW6432Node.
Right-click it and select Delete.
Restart your computer, then try installing again.
💡 This step has fixed the issue for multiple customers when nothing else worked.
If the problem continues after these steps, contact our support team using the chat in the bottom right corner.