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.
![selectlanguage](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_u6mysKMOhf3WHkQ-cdsPKDsxQnzzxZoESOtuDBbNsYc6zWCVFh5sajgTshdTTOiDi8-TwbQmXWgFHP1T6YdD-qdpfdt1YiILkjI8N2R2VyPycFNNXBhEE2_-8w_QXZaPG9VoAYwnu4OBP3UX6XI1a3aHDp=s0-d)
4.Click Repair your computer.
![repairyourcomputer](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_uvkPLKHxezvdtIAg_EwQU9DeHpg3wRtQK8M9mg7JCHjxdjhe9CiSiOM6TuthpOhMCXRxB1W4mADo63lnNJlEtvuRx_MRZAuC900pdxLEYvRwIGn7FTDpQ_4XNaHq7Tm7VGKK1z3g2lMgCz3_6QNCNiN32M87dLTA=s0-d)
5.In the next window,select Windows 7 ,then click Next
![sysronext](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_t8FLWCGeDKPiapHVVVFcQjSZDm2SkrdlconClFCM2rjp5hbV4K0sRyZ7W6Aq7hxH8dGUk0_zQRyAJaXNdQQFguiS--fX2MUBWDjw52HVCBVUolfozVj72Jaam_6A61qT5C4wZgmO8=s0-d)
6.In the System Recovery Options window, click Command Prompt
![sysrocmd](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_sM3dYPpcLCzFbQkxeWIExLrwSoXYzNcmMdseNFF38LqOyzef2n9hxoJVbWZMJp0T17mGCXiCtZA3ieoQbDu5H2Z1O4ul6yvwniuExClqMODlnd0gYUieP4JwLiBxeKvKD08dkqnS4=s0-d)
7.In the command line ,type the below 2 commands and press Enter one by one
![sysrcbootrec](https://lh3.googleusercontent.com/blogger_img_proxy/AEn0k_tC7rRrN3ij1f1heeKC5yWAiRed6MmagjxE17nMAMRRdNcspbkjGgujoiSdbic2-RmxwM19SRCvZ5j1J6Z1Gvy1wHZvNPj-xVAFP35tVIQClG7alADiB6I0M7FNN05pSjvYV5MgKCY3KOofyOFZFY_b6w=s0-d)
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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