When Recovery fails when run from partition on the HD, then the Disks which should have been made as a backup are used. If you didn't make these disks, then they can be ordered from Dell Tech Support.
You can also consider doing a superior clean reinstall using the Windows 7 installation DVD for her version with the Product Key on COA sticker. This actually makes the computer better than new since it doesn't have the freeloading bloatware and useless factory utilities which have better versions built into Windows 7.
The only Dell Utilities worth keeping are System Diagnostics which should maintain their hotkey to run from boot - try it now.
Steps for getting a perfect clean reinstall of Factory OEM:
Reinstalling Windows 7