you can do one thing, first of all scan the downloaded Unlocker file with anti-virus/malware....then proceed to install it....
I downloaded a program called Unlocker from CNET Download. When installing it I was asked whether I agree to install Babylon toolbar, I agreed. With the next scanning of my computer with ESET online scanner, it detected tow files that belong to Babylon toolbar that were considered as threats. When I removed these two files, Unlocker did not work. I uninstalled it and downloaded it again. This time I choosed not to install Babylon toolbar, but when I started installing it, an alert appeared that says: "Spybot Search and Destroy has encountered and terminated a process that is listed as a part of malicious software, the name of the process is Babylon toolbar. Again, Unlocker did not work and I uninstalled it.
This is only for your information.