NTLDR problems can be generated by several things, many of which are easy to fix, these errors usually display NTLDR is missing and press Ctrl Alt Del to Restart.
NTLDR type errors fall into the following categories.
The computer is trying to boot from a non bootable device .
This usually happens when a floppy drive, CD or USB device is left in the computer and it is higher up the boot order than the systems hard drive.
To resolve this simply remove the media that the system is trying to boot from.
To fix the issue properly you’ll need to enter the BIOS and change the boot order, setting the hard drives order above that of other devices which may cause boot problems.
Can the system see the hard drive ?
Double check this by entering the computers BIOS on start-up, it may be something as simple as removing and reconnecting the data and power cables.
It’s also worth checking the data cable and replacing it with a new or known good cable
Is the NTLDR file damaged ?
Copy the files NTLDR & NTDETECT.com from a working computer, or If you are using Windows XP and you have the XP CD, boot from the CD and select the repair option.
Log into your Windows installation, normally by typing 1 & Enter your administrator Password, copy the following files
copy e:i386tldr c:copy e:i386tdetect.com c:
Remove the CD and reboot your computer
Full System Repair
As a last resort run the Windows system repair, boot from the Windows XP CD Follow prompts to install Windows When you see To repair a Windows XP installation using Recovery Console, press R DO NOT SELECT THIS OPTION, Accept the License Agreement and Select the XP Installation you wish to repair and now select R
Once this is finished hopefully your computer will now boot up ok, all files will be ok, unless your pc has a hardware problem with the hard drive, in which case you should make sure you backup any files you would not want to lose.
Search for more on NTLDR error fixes
computer adviser NTLDR error article