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If you’ve renewed your subscription or bought a new Trend Micro license, you’ll need to update your activation code (serial number) on your Windows PC. This quick guide shows you exactly how to do it.
What You’ll Need
What You’ll Need
Before you begin, make sure you have:
Your new Trend Micro Activation Code (20 characters, e.g. XXXX-XXXX-XXXX-XXXX-XXXX)
An active internet connection
Your Trend Micro Security software already installed
Step-by-Step Guide
Step-by-Step Guide
Step 1: Open Trend Micro Security
Step 1: Open Trend Micro Security
On your desktop, double-click the Trend Micro Security icon.
When the main console appears, click the gear icon (⚙️) in the top-right corner
Step 2: Go to Subscription Settings
Step 2: Go to Subscription Settings
Select the Subscription Information or About Subscription option.
Look for Change your serial number or Change Activation Code.
Step 3: Enter Your New Code
Step 3: Enter Your New Code
Type your new 20-character activation code into the field.
Click Next or OK to proceed.
Wait while Trend Micro verifies your license.
Step 4: Complete the Update
Step 4: Complete the Update
Your subscription will automatically update.
The new expiration date and license info will display.
Your protection will continue without interruption.
Troubleshooting Tips
Make sure your internet connection is stable.
Double-check your activation code for typos.
Restart your PC if the old code still appears.
If the problem persists, visit the official support page:
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