TLDR is the file that regulates the start up procedure. Every time you start up your computer, this file tells your computer to load Windows. Ntldr is missing is the only a problem on computers that are running Windows XP or previous operating system. As one of three crucial boot files, along with ntdetect.com and boot.ini, a missing or corrupted NTLDR may prevent operating system from launching or put you into an endless boot and restart sequence.
NTLDR is Missing may occur if the BIOS on your computer is outdated, or if one or more of the following Windows boot files are missing or damaged:
Download this software and install it on a bootable computer. Insert a CD/DVD into your driver (or plug in a USB flash drive into the USB port). Then launch this program, and get the interface like below. This software will check the CD automatically, and you just need to click "Burn". After the bootable CD burning finished, unplug it.
Then turn to the computer that appears Ntldr is missing: insert newly burned CD into this computer, and set your CD drive as the first boot device in BIOS. Press "F10"to save the settings. Then your computer will restart automatically and attempt to boot from the CD you just created.
When Windows fully loads, double click Windows Boot Genius on the desktop to launch it again. Choose "Windows Rescue"from the main menu and select "Crash before Loading Bar". And try the tools it lists one by one until you can login into Windows normally and never appears Ntldr is missing.
Windows 8, Windows 7 and Vista use BootBGR (see how to fix BootBGR is missing error).
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