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You see this error message more than twice while installing the program:

Restart Required. You must restart the computer to make some system changes take effect before installing the software.

Why did this happen?

The installer cannot remove old Trend Micro files even after restarting.

What should I do next?

  1. Log onto your computer using an account with administrator privileges.
  2. Download and install the Trend Micro Remnant File Remover Tool to completely remove these files.
  3. After restarting, run the installer again.

 

If not resolved, follow this solution from our Community.

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