My cursory Google search says that's a keylogger...
It's not a standard part of OSX, and is likely causing compatibility problems with Snow Leopard.
You'll need to be running an administrator account and will be asked to enter the password for it, for the following.
You should be able to get rid of it by running the .command file at the root of your hard drive, LogKextUninstall.command. If you can't find it, try running it through Terminal.app with the following command:
sh /LogKextUninstall.command
If that still doesn't work (file not found or similar), try downloading the file located
here (from the sidebar, view raw file), or just copying all the commands in it to the Terminal window.