Could any one help on below pbm?

Hi,
I have a new Compaq PC with 10GO of HD, and configuring with one partition C:.
After installing win95 and Norton utilities, I check my PC and found 2 drive C: and D: with same size 10GO each ans same content.
Why I have two drives and how can I restore my orinal config with one drive C: and delete D:

Thanks for your help.
Mounir