Your Android device still requires a password to unlock even after disabling the Pre-installation Scan.

This happens because the Pre-installation Scan requires you to create a password before it can be enabled. However, the password will not be removed if the Pre-installation Scan is disabled or your Mobile Security for Android program is uninstalled.

Fix Trend Micro App Credentials

Remove Trend Micro Inc Root CA

1. From your Android device, go to Settings.
2. Tap Security.
3. Tap Trusted Credentials.
4. Tap User.
5. Tap Trend Micro Inc. Root CA.

6. Tap Remove.

   You need to scroll down to find the Remove button.

   You can now remove the password for your lockscreen. If the problem persists, proceed to the next step.

Clear credentials

Clearing the credentials removes all certificates installed on your device. Other apps with installed certificates may lose some functionality.

1. From your Android device, go to Settings.
2. Tap Security.
3. Tap Clear Credentials.
4. A warning message will appear, read it, then tap OK. You can now remove the password for your lockscreen.