How to Assign or Change a Drive Letter for Your DVD-RW
If your computer indicates that your DVD-RW has been installed successfully, but it is not listed in Computer (or “My Computer”), your computer may need to assign it a drive letter, or the drive letter it has assigned may conflict with a drive letter currently in use.
To check/change your drive letter, follow these instructions:
1) Using your right mouse button, click on Computer(or “My Computer”).
2) In the dialog box that appears, click on Manage with your left mouse button.
3) On the left-hand side of the screen, click on Disk Management, beneath Storage.
4) Locate your DVD-RW - It will be labeled “CD-ROM” and then a number. If you have multiple optical drives in your computer, it will usually be the last drive listed.

5) Using your right mouse button, click on the DVD-RW.
6) With your left mouse button, click on “Change Drive Letter and Paths…”
7) If your computer has already assigned it a drive letter, click “Change…”
8) If it has not assigned it a drive letter, click “Add…”
9) On the following screen, choose a new drive letter and click “OK”.

Check in Computer (or “My Computer”) for your DVD-RW.