Okay. Well I have Ubuntu. I don't know anything about it. When I try to install something on the add/remove applications it says:

Unable to get exclusive lock

This usually means that another package management application (like apt-get or aptitude) is already running. Please close that application first.

How do I fix this?
I closed everything.
I restarted my computer.
Please be descriptive as you can get.
I always used windows. This is new to me.
haven't tried Ubunutu....but usually in linux you need to be root to install or remove programs