This is how you find out how big your hard disks are and how much space is free on them.
On the Windows Start menu select "Computer". This opens the Computer window showing your C and D drive.
RIGHT click on the icon for C and from the menu select Properties.
This shows the capacity of your C drive, the USED space and the FREE space.
Write these down, and do the same for the D drive.
When you have these figure, put them in this question.
Here is a picture of the window you will get to show your hard disk size.
http://www.geocities.com/uttoransen1/photo/har d_disk_properties.JPG