The issue occurs due to any of the following:

• Your username and/or password are invalid.
• You are using an account without administrator privileges.
• Windows Firewall blocks incoming or outgoing connection on the ports used by Trend Micro.
• If you are using Windows XP, the target XP machine uses the Simple File Sharing feature.
• If you are using Windows Vista, the File and Print Sharing feature is disabled or the Remote Registry is not running.

To resolve the issue, do one of the following:

For Windows XP

• Make sure that you are using the correct username and password and your account has local administrator rights.
• Disable your Windows Firewall.
• If the target machine is using Simple File Sharing, disable this feature.
  1. Double-click the My Computer icon.
  2. Click Tools > Folder Options.
  3. Click View, and then uncheck Use simple sharing (Recommended).
  4. Click Apply > OK.

  For more information on the feature, refer to this Microsoft article: How to use the Simple File Sharing feature to share files in Windows XP.

For Windows Vista, 7, 8.X, 10

• Make sure that you are using the correct username and password and your account has local administrator rights.
• Turn off your Windows Firewall.
• Enable the File and Print Sharing feature. For the procedure, refer to this Microsoft article: Configuring File and Printer Sharing Behavior in Windows Vista.
• If the Remote Registry Service is not running, set the service to start automatically:
  1. Click Start > Run.
  2. Type “services.msc”.
  3. Right-click Remote Registry, and then click Properties.
  4. Set the startup type to Automatic.
  5. Click OK.