Question: ntldr how to fix windows 7?
Answer: Insert the Windows 7 setup or System Repair CD into the CD/DVD drive and then restart the PC.
Now boot into the Windows 7 setup CD/DVD. ... 
Now press any key to boot from Windows 7 CD when prompted.
Windows 7 installer will then pop up asking for language, format and input method. ... 
Now click on Repair your computer.