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Data Loss When Boot Code Cannot Locate Boot Partit

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When you boot your Microsoft Windows-based computer from hard drive, BIOS (Basic Input/Output System) code describes startup disk and then reads MBR (Master Boot Record) from it. The boot code in MBR searches from active partition on hard drive. If the first hard drive doesn't have any active partition or it can not locate system partition to boot your system, the system can not boot up.

This behavior renders all your mission-critical data inaccessible and causes severe Windows data loss. In such situations, you need to perform windows data recovery to recover inaccessible data from Windows hard drive.

When master boot code of your Windows computer can not locate boot partition, MBR may display any of the below error messages:

Invalid partition table.

Error loading operating system.

Missing operating system.


The problem may occur if there is no active partition on your hard drive that you are using to boot your system, or an incorrect Windows partition is identified as active partition. Corruption of the system or boot partition may also cause this behavior.


You can try to resolve this problem and perform Windows Recovery by using MS-DOS startup disk to boot your system and then using Fdisk utility to change or set active partition.

The Fdisk utility can set only the primary partitions as active. However, if Master Boot Record corruption prevents the tool from changing or setting an active partition, you may need to employ any commercial disk editor to change it manually.

Restore MBR

Sometimes MBR may get damaged. It may be the outcome of virus infection, improper system shutdown, and human errors. In such cases, you can try the below steps to restore MBR:

Use Windows Recovery Console to rewrite MBR so as to fix damaged MBR on startup disk.

Copy MBR of another Windows hard drive using Disk Editor and replace the corrupted MBR. It is possible only if the partition table structure is similar in both the systems.

Overwriting existing MBR and manually recreating partition table options are suggested only for advanced users. The chances of serious data loss are very high in such cases. When you face data loss, Windows Data Recovery Software come for your help.

The applications are powerful enough to effectively handle all types of data loss situations. They enable you to Recover Windows data in a safe and easy way.

Stellar Phoenix Windows Data Recovery software recovers lost, deleted, inaccessible, and missing Windows data from all types of storage media. The software is usable with Microsoft Windows 7, Vista, 2003, XP, and 2000. It retrieves data from FAT12, FAT16, FAT32, VFAT, NTFS, and NTFS5 file system partitions.

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