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Trend Micro main console for Microsoft Edge

Unable to Activate" error message


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For Online and Retail edition:

To extend your subscription or buy additional licenses, please check our Trend Micro Shop.


For Best Buy edition

To extend your subscription or buy additional licenses, contact Best Buy Geek Squad.


"Unable to Activate" error message

You have received the following error message while activating Trend Micro Security:

"Unable to Activate
You have reached the maximum number of installations allowed for this license. You can manage your installations from your Trend Micro Account."

This happens when you have attempted to use a serial number, which seats are already full or used up, when activating the extension.

Free up one installation by managing your Trend Micro Account:

  1. Go to Trend Micro Account.
  2. Type your Trend Micro Account email address and password, then click Sign In.
  3. Look for your product from the list.
  4. Click the X icon located on the upper-right corner of the device you wish to remove protection.
  5. Click Yes to confirm the removal.

    The device/computer will be removed from your account and you can now activate your Trend Micro Security for Microsoft Edge.

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