รู้จัก Boot ของ Windows 7

bootrec คือ โปรแกรม Boot Recovery เป็นโปรแกรมที่มีไว้ซ่อม boot loader ของ
Win7 (xp คือ fdisk)

bcdedit เป็น editor สำหรับแก้ Boot Configuration Data เป็น text file ที่เก็บรายละเอียดการ boot ไว้ (xp คือ boot.ini)

Bootrec.exe options

The Bootrec.exe tool supports the following options. Use the option that is appropriate for your situation. (This works on all versions of Vista and Windows 7 Only)

You can Try the following combination:
Bootrec.exe /FixMbr

The /FixMbr option writes a Windows 7 or Windows Vista-compatible MBR to the system partition. This option does not overwrite the existing partition table. Use this option when you must resolve MBR corruption issues, or when you have to remove non-standard code from the MBR.
Bootrec.exe /FixBoot

The /FixBoot option writes a new boot sector to the system partition by using a boot sector that is compatible with Windows Vista or Windows 7. Use this option if one of the following conditions is true:

* The boot sector has been replaced with a non-standard Windows Vista or Windows 7 boot sector.
* The boot sector is damaged.
* An earlier Windows operating system has been installed after Windows Vista or Windows 7 was installed. In this scenario, the computer starts by using Windows NT Loader (NTLDR) instead of Windows Boot Manager (Bootmgr.exe).

Bootrec.exe /ScanOs

The /ScanOs option scans all disks for installations that are compatible with Windows Vista or Windows 7. Additionally, this option displays the entries that are currently not in the BCD store. Use this option when there are Windows Vista or Windows 7 installations that the Boot Manager menu does not list.
Bootrec.exe /RebuildBcd

The /RebuildBcd option scans all disks for installations that are compatible with Windows Vista or Windows 7. Additionally, this option lets you select the installations that you want to add to the BCD store. Use this option when you must completely rebuild the BCD.

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