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You may need to change your serial number for various reasons, including upgrading to a paid version or replacing an already expired license with a new one.

Reinstalling the program is not needed:

  1. Open Trend Micro Antivirus.
  2. Click Subscription Expires displayed at the bottom right corner of the program.

    Remaining days

  3. Click Change your serial number.

    Change your serial number

  4. Enter your new serial number, then click Done.

    Enter serial number

For other devices

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