Quite by chance, I used these commands on a couple of laptops that booted to a black screen, and they recovered. I'd appreciate an explanation as to when to use which and what they do. I've Googled it, and become very confused as a result! Thanks.
What Is the Fixboot Command?: The fixboot command is a Recovery Console command that writes a new partition boot sector to the system partition that you specify.
Fixboot Command Syntax: fixboot (drive)
drive = This is the drive that a boot sector will be written to and will replace the system partition that you're currently logged on to. If no drive is specified, the boot sector will be written to the system partition that you're currently logged on to.
Fixboot Command Examples: fixboot c:In the above example, the boot sector is written to the partition that's currently labeled as the C: drive - most likely the partition you are currently logged on to. If that is the case, this command could be run without the c: option.
Fixboot Command Availability: The fixboot command is only available from within the Recovery Console in Windows 2000 and Windows XP.
Fixboot Related Commands: The following commands are related to the fixboot command: