The Bootrec.exe tool is a utility that can scan and repair various boot-related problems in Windows. It has four options that you can use depending on the situation: /FixMbr, /FixBoot, /ScanOs, and /RebuildBcd. To use any of these options, you need to type them after the Bootrec.exe command and press Enter. For example, Bootrec.exe /FixMbr. Here is what each option does:
- /FixMbr: This option writes a new master boot record (MBR) to the hard drive, replacing the existing one. The MBR is the first sector of the hard drive that contains the information about how the partitions are organized and how to load the operating system. You should use this option if the MBR is corrupted or infected by malware.
- /FixBoot: This option writes a new boot sector to the system partition, replacing the existing one. The boot sector is the part of the partition that contains the code and information needed to start the operating system. You should use this option if the boot sector is damaged or incompatible with your Windows version.
- /ScanOs: This option scans the hard drive for all the Windows installations and displays them. You should use this option if your computer does not detect your Windows installation or if you have multiple Windows installations on the same drive.
- /RebuildBcd: This option rebuilds the boot configuration data (BCD) store, which is a database that contains the information about how to boot Windows. You should use this option if the BCD store is missing, corrupted, or misconfigured.
You may need to use one or more of these options depending on the severity of the boot sector problem. You can also use them in combination, such as Bootrec.exe /FixMbr /FixBoot /RebuildBcd. After using the Bootrec.exe tool, you should restart your computer and see if it boots normally. If not, you may need to use other tools or methods to repair your computer.