You will need to format your computer, and reinstall windows.
I do not know your level of computer knowledge, so I will leave it at the simplest.
-Enter bios at the beginning of your computer boot. (del, f2, f8, f10, or f12 - it should say)
-Find the "boot order", and select the CD-ROM to first, and "C" to second.
-Put in your windows CD, and restart your computer.
-Select/permit your computer to boot from CD.
-Follow through the windows installation stepts until it asks you which drive to install windows to. Then, repeatedly delete all the drives there (usually the 'd' key - should explain how).
===IF ANYWHERE AT THIS POINT YOU ARE UNSURE OF WHAT TO DO, DO NOT CONTINUE!!! EXIT SETUP AND GO BACK INTO WINDOWS - SEEK FURTHER ASSISTANCE===
-Do this until you have one 6gb chunk called "Unpartitioned".
-Create a new partition (usually 'c' key - it should explain how)
-Once created, select it and press enter to install windows onto it.
-If the option is there to format quickly, use it, it will save you about 20 minutes.
-Allow setup to run through, then it will reboot. This time, do not let it boot from the CD, and let it run into windows.
-Follow the simple steps left, and you will have 1 "c" drive of 6gb with a clean windows on it.
Let us know if you are lost anywhere, or need further assistance.
I am currently running windows 2000. It is partitioned into Drives: C, D and E. Each with 2gb each. I need to unpartion into one 6GB HD. How do I unpartion the Drive? I know I will lose the data.