Re: How do I verify these files are already installed on Ubuntu 12.10?
Before you start downloading drivers from the AMD website and install them manually, you should know that Ubuntu has a way of installing AMD graphics drivers in a safer, better-supported way.
Go to Ubuntu Software Center. Go to the Edit menu and come down to Software Sources. The last tab allows you to easily download and install a set of official AMD graphics drivers, that will keep in sync with your kernel version (the download from the AMD website will NOT).
To answer your actual question, you already have the required software for running the AMD graphics driver. If you were to download and install the driver from the AMD website rather than use the good method I advised you of, then you would need the build-essential package from Ubuntu Software Center. But don't do the manual way - use the method I advised you. It will download and install everything you need anyway.
I hope you've also abandoned the plan to downgrade your kernel so you can run anti-virus. Anti-virus is not necessary for Linux as there are currently no Linux viruses.
It seems like you're having a bit of trouble unlearning your Windows habits; just remember, Linux is incredibly different to Windows, not much of your current knowledge will transfer over. Just pretend to be a computer newbie when using Linux and you'll do fine.
Last edited by 3rdalbum; December 30th, 2012 at 10:03 AM.
I try to treat the cause, not the symptom. I avoid the terminal in instructions, unless it's easier or necessary. My instructions will work within the Ubuntu system, instead of breaking or subverting it. Those are the three guarantees to the helpee.