Knowledge document #1031

Restoring the FRITZ!OS of your FRITZ!Repeater

The recovery program can be used to restore your FRITZ!Repeater to working order. The recovery program resets the FRITZ!Repeater to its factory settings and deletes all of the settings that could be preventing it from working correctly.


  • Windows 11 / 10 / 8 / 7 is installed on the computer.

1 Downloading the recovery program

  1. Call up in your web browser.
  2. Switch to the folder for your repeater model, then to the subfolder "deutschland" or "other", and then to the folder "recover".
  3. Download the recovery program for your repeater to your computer. It has the file extension ".exe".

2 Connecting the computer with the repeater

  1. Use the network cable included with delivery to connect the computer directly to the LAN port on the FRITZ!Repeater.
  2. Clear all other connections between the FRITZ!Repeater and network devices.

3 Disabling firewalls

ATTENTION!Only disable firewalls to run the recovery program and re-enable them before connecting to the internet. This software protects your computer from attacks from the internet and prevents other threats (for example computer viruses) from being executed.

  1. Disconnect the computer from the internet and do not re-establish the internet connection until the firewall is restarted.
  2. Configure all firewalls on your computer (for example, Zone Alarm, Norton Security) so that they are not automatically re-enabled when your computer restarts.
  3. Close any active firewall applications.
  4. Disable the Windows firewall:

    Windows 11 / 10

    1. In the Windows task bar, click (Start) and then "Windows Security" or "All apps" and then "Windows Security".
    2. Click "Firewall & network protection" in the menu "Windows Security".
    3. Click on the active network (normally "Private network").
    4. Disable the Microsoft Defender Firewall.

    Windows 8

    1. Press the keyboard shortcut Windows key + X and select "Control Panel" from the context menu.
    2. Click "System and Security" and then "Windows Firewall".
    3. Disable the Windows firewall:

    Windows 7

    1. In Windows, click "Start" and then "Control Panel".
    2. Select "Category" from the drop-down list "View by:" on the top right ().
    3. Click "System and Security" and then "Windows Firewall".
    4. Disable the Windows firewall:

4 Running the recovery program

  1. Run the file "FRITZ.Repeater[...].exe" and click "Next".
  2. Follow the instructions.
  3. If the program displays an error message such as "Recovery failed due to an error", run the program again. If executing the recovery program fails after several attempts, run the program on a different computer.
    • If the recovery program displays the message "Complete - FRITZ!Repeater successfully restored!", recovery was successful.

5 Error when running the recovery program

Recovery program cannot find the FRITZ!Repeater

The recovery program cannot find the FRITZ!Repeater and constantly displays the error message "FRITZ!Repeater [model] searching at: [IP address]".

  1. Do not click "Next," click "Cancel" twice instead.
  2. Make sure that all firewalls are disabled.
  3. Run the recovery program again.

Error message "Could not determine the version!"

The recovery program displays the error message "Could not determine the version!":

  1. Click "Cancel" to exit the recovery program.
  2. Click the search symbol in the Windows task bar.
  3. Enter Device Manager in the search box and press Enter.
  4. Under "Network adapters", double-click the LAN network adapter that is connected to the FRITZ!Repeater, and select the tab for the advanced settings (for example "Advanced" or "Advanced Settings").
  5. Select the property for setting the transmission rate (for example "Transmission Rate", "Connection Type", "Speed & Duplex", "Media Type").
  6. Select the value "10 Mbit/s, half-duplex" or similar and click on "OK".
  7. Run the recovery program again.