What is your larger goal? Why do you want to do this? Also, does the system
in question use FAT or NTFS for its boot partition? If NTFS, you would not
be able to access the drive. Now, for recovery, there is the recovery
console, if installed. That does give you a command prompt, and a limited
subset of commands, after you log on as administrator, and you can use it
for troubleshooting and, well, recovery.