If your mbr or boot loader is missing or broken ,you can use your windows 7 installation dvd or system repair disc to fix your boot loader and mbr.
1.Boot from your windows 7 installation dvd or system repair disc
2.Press any key when prompted
3.Select a language, a time, a currency, a keyboard or an input method, and then click Next.
4.Click Repair your computer.
5.In the next window,select Windows 7 ,then click Next
6.In the System Recovery Options window, click Command Prompt
7.In the command line ,type the below 2 commands and press Enter one by one
8.Click Restart to reboot your PC,then you should can get your boot loader / mbr repaired.
9.(Optional)If you dual boot your windows 7 with Windows xp,you need to use bcdedit to add Windows xp to your boot loader.
a)Open an elevated command prompt.
b)Type the following command,assume D: is the drive letter of your xp installation
c)Reboot
1.Boot from your windows 7 installation dvd or system repair disc
2.Press any key when prompted
3.Select a language, a time, a currency, a keyboard or an input method, and then click Next.
4.Click Repair your computer.
5.In the next window,select Windows 7 ,then click Next
6.In the System Recovery Options window, click Command Prompt
7.In the command line ,type the below 2 commands and press Enter one by one
bootrec /fixmbr bootrec /fixboot
8.Click Restart to reboot your PC,then you should can get your boot loader / mbr repaired.
9.(Optional)If you dual boot your windows 7 with Windows xp,you need to use bcdedit to add Windows xp to your boot loader.
a)Open an elevated command prompt.
b)Type the following command,assume D: is the drive letter of your xp installation
bcdedit /create {ntldr} /d "Windows XP"
bcdedit /set {ntldr} device partition=D:
bcdedit /set {ntldr} path \ntldr
bcdedit /displayorder {ntldr} /addlast
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