Enter Trend micro activation code on www.trendmicro.com/activate to download and activate Trend Micro. To activate Trend micro, make sure you already have an activation code that you’ll probably enter on the trend micro activation site.
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Security for Windows
Open Trend Micro, then click Activate Now
Provide a computer name, then click Next
Type your email address, then click Next
Fill out the Account Information window, then click Next.
Check if the information is correct, then click Next and then Finish
Security for Android
Tap the Mobile Security app.
Tap Use an Activation Code, then type your serial number.