You could always back up your files, create an install DVD or USB thumb drive for the older version of Ubuntu and install that (make sure it is a version still supported)...back in college when I knew almost nothing about computers I did some reading and figured out how to do that to make a media PC/emergency backup for my flakey school issued laptop out of a junk desktop without harddrive I found on the side of the road.
You gotta check if the OS or the echolink software is asking you for a password...If it is the OS it's possible your computer guy made himself the administrator of your PC and might be remotely using it for things without your permission.
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