“Invalid Serial Number” error message appears when activating Trend Micro Security program
- Solution ID:1054753
- Last Updated:Jul. 08, 2019 6:16 AM (PST)
- Applies to:Antivirus for Mac - 2016, Antivirus for Mac - 2017;Antivirus for Mac - 2018;Antivirus for Mac - 2019;Antivirus+ Security - 2016;2017;2018;2019;Internet Security - 2016;Internet Security - 2017;Internet Security - 2018;Internet Security - 2019;Maximum Security - 2016;Maximum Security - 2017;Maximum Security - 2018;Maximum Security - 2019;Premium Security - 2016;Premium Security - 2017;Premium Security - 2018;Premium Security - 2019;
- "Invalid Serial Number" | Error Message | Trend Micro Security
You receive the following error message when trying to register or activate your Trend Micro Security:
"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 can happen in any of the following scenario:
- You entered an incorrect serial number.
- You downloaded a version of the Trend Micro program that is incompatible with your serial number.
- The downloaded installer of the Trend Micro program is incomplete.
To resolve this issue, do either of the following:
The issue can happen if you used a different serial number or mistyped the serial number when activating the program. You can resolve this by changing the serial number in the program's main console. To do this, follow the steps below:
- Double-check the serial number of your program.
If you purchased your Trend Micro program online, you can find the serial number on the order confirmation email.
If you purchased the program from a retail store, look for the serial number in the sticker on the product box.
- Re-type your serial number.
- Click Next.
- Click , then select Subscription Information.
This will open the Subscription Information window.
- Click Edit subscription information. You will be asked to sign in to your Trend Micro Accout.
- Sign in to your MyAccount to verify that the expiry date on your Trend Micro Security program is the same as the one found on your account.
- Right-click the Trend Micro icon in the System Tray (near the clock at the bottom right part of the screen).
If you do not see the System Tray icon, click the arrow button to show the rest of the icons.
- Select Exit.
- Wait for Trend Micro's System Tray icon to disappear.
Once the icon disappears, Trend Micro is now disabled.
- Launch Trend Micro Security software by clicking the Trend Micro icon on your desktop.
Using the serial number to activate a wrong Trend Micro program can also result in getting the error message. Serial numbers follow a different format for each program depending on how you acquired the serial number.
Check your serial number format, then download the correct installer below:
For your existing Trend Micro program
For programs purchased from Best Buy (US)
Serial Number Starts with 'TA' or 'TO'Internet Security
Serial Number Starts with 'TC'Antivirus for Mac
You can visit Best Buy's website if you need further assistance.
For programs purchased from QVC
For programs availed from your Internet Service Provider
Make sure you have downloaded the complete installer package. You may go back to OPTION 3: Download The Appropriate Installer File to re-download the installer.
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