FIXBOOT und FIXMBR

Windows 10
Quickly Fix: Bootrec /Fixboot Access Is Denied in Windows 10
https://www.partitionwizard.com/clone-disk/bootrec-fixboot-access-is-denied.html

Bootmenü reparieren wiederherstellen Windows 10
https://www.deskmodder.de/wiki/index.php/Bootmen%C3%BC_reparieren_wiederherstellen_Windows_10


http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/bootcons_fixboot.mspx?mfr=true

Fixboot
Writes a new partition boot sector to the system partition. The fixboot command is only available when you are using the Recovery Console
fixboot [drive]

Parameter drive:
The drive to which a boot sector will be written. This replaces the default drive, which is the system partition you are logged on to.

The following example writes a new partition boot sector to the system partition in drive E:
fixboot e:

Using the fixboot command without any parameters will write a new partition boot sector to the system partition you are logged on to.


Fixmbr
Repairs the master boot record of the boot disk. The fixmbr and fixboot commands are only available when using the Recovery Console


fixmbr [device_name]

Parameter   device_name :
The device (drive) on which you want to write a new master boot record. The name can be obtained from the output of the map command. An example of a device name is:
\Device\HardDisk0.

Example:   The following example writes a new master boot record to the device specified:

fixmbr \Device\HardDisk0

Note: If you do not specify a device_name, a new master boot record will be written to the boot device, which is the drive on which your primary system is loaded.

Source:
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/recovery_console_overview.mspx?mfr=true


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Command-line reference A-Z
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/ntcmds.mspx

Diskpart
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/bootcons_diskpart.mspx

Map
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/bootcons_map.mspx

Recovery Console overview
http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/recovery_console_overview.mspx


Recovery Console commands
.
.

To install the Recovery Console as a startup option

1. With Windows running, insert Setup CD into CD-ROM drive.
2. Click Start and select Run.
3. Type the following where D: is the CD-ROM drive letter:

D:\i386\winnt32.exe /cmdcons

4. Follow the instructions on the screen.

http://www.microsoft.com/resources/documentation/windows/xp/all/proddocs/en-us/recovery_console_overview.mspx?mfr=true


Download von fixboot.exe und fixmbr.exe:
http://www.system.blueblood.de/Windows/