If you see an "Installation Incomplete" error while installing Trend Micro Security on your Windows PC, it usually means there are leftover files from a previous installation that are getting in the way. Follow the steps below to clear them out and finish your installation.
Error Message and Codes
You may see this message on your screen:
"Installation Incomplete — A problem prevented the installer from completely setting up Trend Micro Security. No changes have been made to your computer."
This error can appear with any of the following error codes:
- #1603, 3002, 0x00000000
- #1603, 3003, 0x00000000
- #1603, 3003, 0xe0120004
- #1603, 3003, 0xeoff000b
- #1603, 3003, 0xe0ff000h
- #1604, 0, 0x00000000
- #1625, 0000, 0x00000000
Why Does This Happen?
Old or leftover Trend Micro files on your computer can prevent a new installation from completing. This often happens if a previous version of Trend Micro wasn't fully uninstalled, or if an earlier installation attempt was interrupted. The fix is to remove those leftover files so the installer can start fresh.
How to Fix It
Follow these steps to clear the old files and finish your installation:
-
Download and run the Trend Micro Remnant File Remover Tool.
This free tool finds and removes leftover Trend Micro files automatically.
👉 Get the Trend Micro Remnant File Remover Tool -
Restart your computer when prompted.
This step is important — the removal isn't complete until you restart. -
Run the Trend Micro installer again.
👉 How to install Trend Micro Security
Once installation completes, open Trend Micro Security and confirm the status shows Protected. If it does, you're all set! ✅
Still Having Trouble?
If you still see the "Installation Incomplete" error after following the steps above, there may be a deeper conflict with another program on your PC. Contact Trend Micro Support and we'll help you sort it out.