No worries. The Internet has plenty of online tutorials and I will add my own screen shots to fill in the gaps. I apologize for the amount of space this post is going to take up because my screen shots haven't been resized to avoid losing details.
1) Put an unreadable CD-R in the DVD drive.
2) Open the My Computer window:
How to Open My Computer in Windows 7How to Open My Computer in Windows 73) In that My Computer window, left-click on the icon for the DVD drive to select that drive:

4) Now right-click on the DVD drive icon to bring up its Context Menu:

5) Move the mouse pointer to the bottom of that menu, down to the Properties menu item:

6) Click on the Properties menu item to display the Properties window for the DVD drive (either left-click or right-click will work):

I have a regular audio CD in my DVD drive so the Properties window for your DVD drive will look different.
7) Follow eyore's instructions on how to take a screen shot of your computer screen and how to post it. Or you can watch this video on how to use the Windows 7 Snipping Tool:
How to Use Windows 7 Snipping Tool