You turn on your computer. You receive the following message: "System Disk Not Found." Which Windows feature should you use to restore your computer?

Automated System Recovery (ASR) is a Windows XP/Server 2003 feature for restoring a system to a previous state, which won't help if the system disk itself cannot be found.

Last Known Good Configuration restores the operating system to the last successful boot state, but it requires the system disk to be accessible and the OS to begin loading, which is not the case if the disk isn't found.

Check Disk (Chkdsk) is a utility designed to scan a disk for file system errors and bad sectors, attempting to repair them; this can resolve issues preventing the system from recognizing or booting from the disk.

Safe Mode is a diagnostic boot option that loads a minimal set of drivers, but it requires the system disk to be recognized and bootable enough to reach the boot menu, which is not possible with a 'disk not found' error.