NTLDR is the boot loader that is used for starting Windows operating systems. While booting, the computer may an show error message and this happens due to corrupt NTLDR and the NTDETECT.com file. It still possible to get rid of the error even without the Windows installation CD. Two requisites are needed for this - a USB key and a blank CD and a DVD. The procedure can be completed through the download and preparation of the NTLDR and the NTDETECT file and as well as the XP recovery console.
NTLDR - Boot.ini - NTDETECT Missing (no installation CD)
If you have the Windows installation CD read this tip: /faq/4112-ntldr-boot-ini-ntdetect-missing.
If you do not have the installation CD and receive one of the below error messages, this solution is for you!
NTLDR is missing
NTLDR is missing. Press CTRL + ALT + DEL to restart NTLDR is compressed. Press CTRL-ALT-DEL to restart NTLDR is compressed. Press CTRL + ALT + DEL to restart NTDETECT V1.0 Checking Hardware ... NTDetect Failed Invalid Boot.ini