USB Blocker Professional 1.0.1 could be downloaded from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. The actual developer of the software is MWISoft. We cannot guarantee that the program is safe to download as it will be downloaded from the developer's website. Before launching the program, check it with any free antivirus software.
From the developer:
USB Blocker Professional is a security software that prevents data theft, data loss and malware infections by blocking all untrusted USB devices.The program maintains a list of authorized USB devices that are permitted to access your PC.By default, USB Blocker Professional does not allow access to any unauthorized USB device unless you authorize it. You must be an administrator to install and uninstall the software
You may want to check out more software, such as USB Blocker, USB Block or Windows USB Blocker, which might be related to USB Blocker Professional.