what is ntldr is compressed?

Answer 1

NTLDR (abbreviation of NT Loader) is the boot loader for Windows NT, including its later versions (2000/XP/Server 2003 but not Vista, which divides the functionality of NTLDR between two new components: winload.exe and the Windows Boot Manager. NTLDR can be run from either portable storage (such as a CD-ROM or USB flash drive), or the primary hard disk. NTLDR can also load a non NT-based operating system given the appropriate boot sector in a file.

NTLDR requires, at a minimum, the following two files to be on the system volume: NTLDR, which contains the main boot loader itself, and boot.ini, which contains configuration options for a boot menu. To load an NT-based OS, ntdetect.com must also be present.

Answer 2

first off - do not delete it. it is an important system file. if the filename is in blue that means windows has compressed it to take up less space on the hard drive.

Delete it and you will have lots of wasted hours trying to get your windows to boot!!

Now... for the technical part

NTLDR (abbreviation of NT Loader) is the boot loader for Windows NT, including its later versions (2000/XP/Server 2003 but not Vista, which divides the functionality of NTLDR between two new components: winload.exe and the Windows Boot Manager. NTLDR can be run from either portable storage (such as a CD-ROM or USB flash drive), or the primary hard disk. NTLDR can also load a non NT-based operating system given the appropriate boot sector in a file.

NTLDR requires, at a minimum, the following two files to be on the system volume: NTLDR, which contains the main boot loader itself, and boot.ini, which contains configuration options for a boot menu. To load an NT-based OS, ntdetect.com must also be present.

Answer 3

http://www.computerhope.com/jargon/n/ntldr.htm