Software & Apps Windows Fixmbr Command (Recovery Console) Use the 'fixmbr' command in the Windows XP Recovery Console by Tim Fisher General Manager, VP, Lifewire.com Tim Fisher has 30+ years' professional technology support experience. He writes troubleshooting content and is the General Manager of Lifewire. our editorial process Facebook Twitter LinkedIn Tim Fisher Updated on March 18, 2020 Windows The Ultimate Laptop Buying Guide Tweet Share Email The fixmbr command is a Recovery Console command that writes a new master boot record to the hard disk drive that you specify. The fixmbr command is only available from within the Recovery Console in Windows 2000 and Windows XP. 'Fixmbr' Command Syntax The command takes the following form: fixmbr device_name The device_name parameter designates the drive location that a master boot record will be written to. If no device is specified, the master boot record writes to the primary boot drive. 'Fixmbr' Command Examples Two examples of the command illustrate its usage. fixmbr \Device\HardDisk0 In the above example, the master boot record writes to the drive located at \Device\HardDisk0. fixmbr In this example, the master boot record writes to the device supporting your operating system. If you have a single installation of Windows installed, which is normally the case, running the fixmbr command in this way is usually the right way to go. The bootcfg, fixboot, and diskpart commands are often used with the fixmbr command.