How to Repair MBR on Windows 7

Step 1:
Insert the Windows 7 DVD in to your drive and reboot your System. You'll be asked to press any key to boot from the cd.
Step 2:
Then it will give you language selection option click Next
Step 3:
Then you’ll find and option to "Repair your Computer"
Step 4:
Then you’ll be prompted to Select the Operating System i.e. Windows 7, select that and click Next
Note: Some occasions you’ll not find any operating system listed. Don’t panic just click Next
Step 5:
Now click on "Startup Repair"
Step 6:
Click on Command prompt and type in
Code:

bootsect /nt60 C:\

if you had Windows 7 is installed in the C partition. Also to repair all the partitions you could run

Code:

bootsect /nt60 SYS or bootsect /nt60 ALL

THANKS...