extra cd rom drive showing

Hi. I'm running windows 98. i've got a hard drive partitioned into two parts, C and D drives. I also have a cd burner (E drive) and a cd drive (F drive). I also have my cd-less laptop networked to the desktop. In the past, anytime I needed to install a program on to my laptop, I would just put the cd into my desktop and access it through network neighborhood on the laptop. Last week, though, I tried to install something in this fashion and it wouldn't work, so I started tinkering with mapping network drives. I have no clue what I did, but now I have an icon for a G: drive on my desktop and I can't access the cd drive anymore. I get the message the drive isn't ready. It also isn't allowing me to burn cd's to the burner. I tried two different programs and both of them crashed. Now, this morning, the computer is crashing on startup.
My question is, how do I get rid of that G: drive?
Thank you!