|There is no "My Computer" in Windows 7 (or Vista) , unless you have disabled the default Hide protected operating system files and folders yourself, and in that case it's there for previous operating system compatibility, and you can't use it like you are able to in XP and below.|
Windows 7 (and Vista) has the similar Computer rather than My Computer.
If the drive doesn't show up in Computer in Windows 7....
What is the make and model of your brand name computer, or if you have a generic desktop computer, what is the make and model of the mboard ?
The optical (CD or DVD) drive must be connected properly and show up in the mboard's bios Setup - does it ?
Is it an external drive and connected via a USB connection ?
The USB port you have it plugged into must actually be able to supply 500ma to the drive, etc. ....
Troubleshooting USB device problems including for flash drives, external drives, memory cards.
See Response 1:
Have you just connected this DVD drive internally ?
Have you just been fiddling with the connections of this DVD drive ?
Is the DVD drive IDE (EIDE) or SATA ?
Have you looked in Device Manager to see if the DVD drive shows up there, and if so, is it flagged as not working properly with a yellow ! or a red X ?
(E.g. Click on Computer - select System Properties in the top bar - the link to Device Manager is on the left of the resulting screen.)