“Invalid Serial Number” error message appears when activating Trend Micro Security program

  • Solution ID:1054753
  • Last Updated:Nov. 07, 2019 10:15 PM (PST)
  • Applies to:Antivirus for Mac - 2018;Antivirus for Mac - 2019, Antivirus for Mac - 2020;Antivirus+ Security - 2018;2019;2020;Internet Security - 2018;Internet Security - 2019;Internet Security - 2020;Maximum Security - 2018;Maximum Security - 2019;Premium Security - 2018;Premium Security - 2019;
  • Fix "Invalid Serial Number" error message

You receive the following error message when trying to register or activate your Trend Micro Security:

Invalid Serial Number

"Invalid Serial Number
You have not provided a valid serial number. Please try again."

"You have entered an invalid serial number.
Without a valid serial number, Trend Micro Security cannot protect you. Please try again."


This issue happens when you have entered an incorrect serial number.

To resolve this issue, do either of the following:

Expand All
OPTION 1: Retype your Serial Number
OPTION 2: Restart your Trend Micro Security software


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