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You see this error message after upgrading Trend Micro Security to its latest version on Windows:

"Backend servers are not reachable"

Why did this happen

The Trend Micro program encountered issues connecting to our Trend Micro server.

How do I fix this?

Restart the Trend Micro program:

  1. Press the Windows ⊞ and R keys on your keyboard to open the Run window.
  2. In the Open field, type supporttool.exe, then click OK.
  3. Click Yes when the User Account Control Window appears.

    The Trend Micro Diagnostic Toolkit will open.

  4. Click the (C) Uninstall tab.
  5. Click 5. Stop all components.
  6. Wait for 10 to 30 seconds.
  7. Click 4. Start all components on the Trend Micro Diagnostic Toolkit window to turn it back ON.
  8. Try to open the program again.


If the issue still occurs, contact our Trend Micro Support for assistance.

Keywords: Backend servers are not reachable
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