The installation of AppFabric was not successful due to the error code 1603 being returned by the installer MSI.

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This error code usually indicates that there was an issue with the installation process. There are several possible causes of this error, including:

1. Insufficient permissions: Check if the account you are using has sufficient permissions to install software on the system.

2. Corrupted installation files: Check if the installation file is not corrupted or damaged. You can try downloading a fresh copy of the installation files.

3. Conflicting software: Check if there is any other software installed on the system that might be conflicting with AppFabric. Try disabling or uninstalling the conflicting software before attempting the installation.

4. Incomplete installation: Check if there is any previous installation of AppFabric that was not properly removed. You may need to uninstall the previous installation before attempting a new installation.

5. System requirements: Check if your system meets the minimum system requirements for AppFabric. Make sure you have all the necessary components installed on your system.

If none of these solutions work, you may need to contact Microsoft support for further assistance.