Hi. My name is***** you for your question and the opportunity to assist. By "command prompt" are you referring to Safe Mode with Command Prompt? If so, have you tried starting System Restore from the command prompt? At the blinking prompt type: rstrui.exe press Enter and try to run it that way.
Thanks. Are you running Norton on your laptop?
At the command prompt type: sfc /scannow and press Enter.
The system file checker utility will try to replace missing or damaged files.
I'm not sure this will make a difference but if it can't access a file because it's not where it should be this may help.
You wouldn't happen to have a Win 7 pro install disk to run repairs from would you?
If you've got a Win 7 Pro DVD it will work to try repairs. Tap F12 at the Dell screen at startup to launch the startup menu and select DVD.
If you can't fix it from the disk you may need to do an image recovery.
In this situation I can't remote in and perform these steps
Scroll down to: ***** ***** 7 Recovery
The normal Windows tools aren't getting the job done and short of a complete factory recovery
this is the next-to-last option.