Most of the time, when Windows-ul refuses to boot, the cause is o BCD error (Boot Configuration Data). In such cases, most system administrators I use the Command Line Utility BCDEdit.exe, which allows them to CREATE, edition or SA Etarga inputs from BCD in order to repair boot errors. This utility, however, is not easy to use by common users of operating systems Windows, and any mistake in command lines can make operating systems become inoperable (not to boot).
Dual-Boot Repair Tool It's O Free utility and portable (does not require installation) with the help of which Windows users can repair Erori (Master Boot Record), PBR (Partition Boot Record) si BCD through one simple interfaces And easy to use and understand.

Main Dual Boot Repair Tool options:
- Repair BCD - Check Boot Configuration Date to identify Incorrect parameters SI and solve any errors that blocks the system boot or cause incorrect booties
- Backup/Export BCD - Allows Creating BCD backups (it is recommended to create such a backup before bringing any type of changes)
- Restore/Import BCD - Allows Restoration of BCD from a backup made in more with this utility
- Repair MBR & Boot Records - Repair problems and errors of MBR's and errors of Ntld (NT Loader); also writes new boot sectors To replace defective or non-standard sectors
- Automatic Repair - If you do not know for sure what are the problems of the system, use this option to try a automatic repair of them
The rest of the options are shortcut-uri by tool-uri native of the system (Disk Management or utility BCDEdit) and for Page De Help For Tool, available on the Developer website (Online Help).
Download Dual-Boot Repair Tool.
Note: Windows XP compatible utility, Windows Vista, Windows 7 and Windows 8/8.1
STEALTH SETTINGS – Repair Windows BCD errors with Dual-Boot Repair Tool