Tool in Windows Recovery

Bootrec.exe Tool in Windows Recovery 

To run this tool you must do so from within the Windows 7 Recovery Environment.

1. Make sure your computer is configured to start from the DVD drive
2. Insert your Windows installation DVD or Windows repair DVD
3. Press any key when prompted
4. Choose your language, time, currency, keyboard language and click Next
5. Click Repair your computer
6. Select the operating system you want to repair and click Next
7. Click Command Prompt in the Systems Recovery Options dialog box
8. Type the following commands in the Windows RE command prompt window and press Enter to execute each command (paying particular attention to insert a space where shown below):
9. bcdedit /export C:\BCD_Backup
10. c:
11. cd boot
12. attrib bcd -s -h -r
13. ren c:\boot\bcd bcd.old
14. bootrec /RebuildBcd

When you have finished, type Exit at the command prompt then press Enter to close the command prompt window. Restart your computer.