A Windows 7 based system becomes unbootable when its booting process halts due to corruption in boot loader, invalid device driver update, system file damage, kernel panic, and other similar reasons. In most cases of an unbootable system, the user encounters a BSOD (Blue Screen Of Death), black/blue screen with flashing cursor, or a 'startup repair' failure error message. In either of the above outcomes, data saved in Windows 7 based hard drive becomes inaccessible. To access the data in such situations, Windows user needs to restore data from an updated backup. However, if the backup disappoints you and restores incomplete data, then you will need to use an efficient third-party Data Recovery Software to recover lost data. Below is one such scenario that explains Windows 7 unbootability problem in detail.

Suppose you have a dual-boot system with Windows Server 2008 and Windows 7 operating system (on primary partition) installed. You installed some driver updates in Windows Server 2008 and restart your system. However, to your surprise, when you reboot your system, you encounter a black screen with flashing cursor. The black screen appears every time you try to boot your system. Since the system is unable to bypass the black screen, the data saved in both Windows Server 2008 and Windows 7 based partitions becomes inaccessible.

Cause:

The above stated problem occurs under following situations:

Corruption in Boot.ini file.

Invalid device driver update.

File System damage.

Resolution:

To resolve the above issue and to access data saved in both the partitions, you will need to follow the below steps:

Boot the system in Safe mode and select 'Last Known Good Configuration' option.

Try to boot your system using 'Startup Repair' option.

Run 'CHKDSK' command to repair the file system.

However, if all the three resolutions fail to resolve the issue, then you will need to reinstall the operating system and restore data from an updated backup. However, in case of no backup, you will need to recoup data using commercial Data Recovery utility. Such data recovery tools use effective recovery techniques to recoup data after almost all logical data loss scenarios.

Windows Data Recovery is a third-party Data Recovery Software that recovers data from formatted Windows 7, Vista, XP, 2003, and 2000 based hard disks. Supported by almost all file systems (NTFS, NTFS5, FAT12, FAT16, FAT32, and VFAT), the tool is easy to understand and doesn't require any prior technical knowledge.