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Fix MBR without external media Some latest versions of Windows like Windows 10 support fixing Master Boot Record without the help of external media like a USB drive or CD/DVD disc. Rebuild MBR via a free partition manager Method 1. Original DOS 2.0 specification allowed only 4 partitions per disc, but DOS 3.2 introduced concept of "extended partitions", which work as nested extra "boot records" which are pointed to by original ("primary") partitions in MBR. Fix MBR with System Repair Disc Method 3. This table is stored in the end of the boot sector (first sector) of the drive, after the bootstrap code. Right clicking on it yields only a 'Help' command. But it will not allow me to delete the 1st partition, the MBR. XPs Computer Management facility allows me to delete the data partitions of that drive. bootrec.exe/fixboot to write new boot sector. bootrec.exe/fixmbr to repair damaged MBR.
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Once the system is booted, navigate to Troubleshoot > Advanced options > Command Prompt > and then execute this command - bootrec.exe /fixmbr. Meta : id : mbr_partition_table title : MBR (Master Boot Record) partition table xref : forensicswiki : Master_boot_record wikidata : Q624752 tags : - dos license : CC0-1.0 endian : le doc : | MBR (Master Boot Record) partition table is a traditional way of MS-DOS to partition larger hard disc drives into distinct partitions. How delete Master Boot Record I have installed as a 2nd hard drive, a drive which previously was a primary drive in a dual boot situation. Boot the system using recovery disc or system repair disc.