Posted 06 April 2010 - 07:59 AM
From the looks of your screenshot, it doesn't have to do with Search with Google, so I don't think your deleting of the command in System Preferences will be enough. It looks like you have some sort of helper application (called a daemon) running silently that you installed (or got installed) a while back. The first place to look to see what it is is in System Preferences -> Accounts, then click the tab 'Login Items'. If you aren't sure what the items are in that list, you can post a screenshot and I'll dissect it for you. If you do see something there that would account for it, just select it and click the minus button to prevent it from starting when you login.
Now, most daemon applications have some sort of way for the user to interact with it. I'd imagine that it is probably doing something good for your system, and maybe just needs to be configured differently to not steal Command-Shift-L. Often, if they aren't visible in the dock, they place a little helper in the Menu Bar. Do you see anything up there that isn't standard Mac OS X (Clock, Wireless, Battery, Bluetooth, Spotlight)? You can also take a screenshot of that part of the menu bar and post it here if you want me to look at it.
If you don't see anything odd there or in Login Items, it may be running even more in the background. In that case, I'd look in Activity Monitor. I'll give you those instructions later, for now, let me know how looking in Login Items or at the Menu Bar works.
By day: Consultant for Oaktree
By night: Freelance Trombonist and Private Instructor