1. Connect your computer to the internet.
2. Click Activate Now. The program should now communicate to the Trend Micro activation server.

3. Type the name of your computer, then click Next.

   

4. Click Finish.

   

It is highly recommended to only have one antivirus program installed on your computer. Having multiple antivirus programs installed can make your computer more vulnerable to threats and prone to performance and activation issues.

For complete instructions on how to remove conflicting programs, refer to this Knowledge Base article: Programs to remove before installing Trend Micro Security.

1. Uninstall suspicious programs from the Control Panel.
   1. On your keyboard, press the Windows Windows + R keys
   2. In the Open field, type "appwiz.cpl", then press ENTER. The Programs and Features window will open.
   3. Select the program you wish to remove, then click Remove or Uninstall.
   4. Wait for the program to be uninstalled, then restart your computer. If you encounter any problems with the uninstallation process, contact the software manufacturer's support team.
2. Scan your computer for any potential malware infection. For the complete list of conflicting programs, refer to this Knowledge Base article: How to scan your computer using Trend Micro HouseCall for Home Users.

To reinstall the latest version, refer to this Knowledge Base article: How to reinstall your Trend Micro program.