NTLDR is the boot loader for Windows Explorer 7 operating systems which are NT based. In addition to the boot loader, NTLDR also requires NTDETECT for successful operation. Sometimes users may get an error saying NTLDR, boot.ini. or NTDETECT missing. To get around this error one has to start the repair using the recovery console. The user can repair the operating system using the installation CD. There are, however, ways in which users can prevent this problem from happening. One way is to create a system boot disk and copy the NTLDR, boot.ini and NTDETECT.