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If you get an "Unable to Activate" error while trying to use the Trend Micro extension in Microsoft Edge, follow these steps to fix it.

Why This Happens

This error occurs because the activation key you used has reached its maximum number of activations.

How to Fix the Error

To fix this, you need to free up a slot in your Trend Micro account:

  1. Go to the Trend Micro Account website.
  2. Log in with your email and password.
  3. Find the activation key you used.
  4. Click the X icon next to the device you want to remove.
  5. Click Yes to confirm.


After freeing up a slot, you can use the activation key to activate your extension again.

Bought from Best Buy?

If you bought your Trend Micro subscription from Best Buy, contact the Best Buy Geek Squad for help with your subscriptions or to buy more licenses.

Keywords: Trend Micro, Microsoft Edge, activation error, serial number, manage account
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