|So you downloaded the firmware upgrade for the GSA-T21N and it refused to install because it couldn't find the drive?|
I did find some discussion from others having the GSA-T11N in that model and having the same problem.
I doubt it matters but the upgrade doesn't list windows 7 as one of the compatible OS's.
This is a firmware upgrade for the "HLDS GSA-T11N" which I assume is what you have. Dell shows it as being in an Optiplex but the firmware upgrade should depend on the DVD model and not the laptop model:
I assume if it's not the right one then you'll get the same error.
"It was far easier for you as civilized men to behave like barbarians
than it was for them as barbarians to behave like civilized men."