Notes about the NT file extension:
Incorrect file associations could be the result of underlying issues within your PC system. As such it is highly recommended to scan your PC for invalid registry entries, unused processes and other unfavourable system settings to identify slowdown issues.
The NT file type is primarily associated with 'Windows NT' by Microsoft Corporation. After a Windows XP SP2 upgrade (or being attacked by some malware) you may encounter a message about either CONFIG.NT or AUTOEXEC.NT being "...not suitable for running MS-DOS and Microsoft Windows applications." The DOS 16-bit COMMAND.COM program and/or one of those files has become corrupted. Microsoft has a knowledgebase article on this. What it basically says is that you need to replace the files AUTOEXEC.NT, CONFIG.NT, and COMMAND.COM which are found in your Windows System32 folder with the same-named files found on your original OEM Windows XP CD-ROM. (Copies can also usually be found in the \Windows\Repair subdirectory if you can't find your original CD.) Also, some versions of the Windows XP SP2 update have code that will automatically delete the AUTOEXEC.NT file if found in the System32 folder on the theory that all software should be 32-bit and not 16-bit (as it older programs you might still want to run). If this happens to you try copying the AUTOEXEC.NT file to the System32 folder under the Windows folder and then right click on it, select Properties, and check the Read Only attribute. This should work but if it does not you will have to recopy the file to the proper directory after every restart of the computer. See the FAQ for more information.
Detailed information for file extension NT:
Primary association: Windows NT
File classification: Source Code
Mime type: application/x-nt
Program ID: cmdfile
Important: Invalid file associations could be the result of underlying issues within your Windows PC. It is highly recommended that you scan your PC for invalid registry entries, unused processes and other slowdown issues.
To view technical data on file-extension NT click this link
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System Info for File Extension .NT
The following listing is compiled from the database produced by the 'Associate This!' program, selected data from the main FILExt database and information FILExt collected directly
from user systems.
ProgramID: cmdfile, FileType: Windows NT Command Script, AppName: %1
EXEFile: %ProgramFiles%\Windows Journal Viewer\jntview.exe %1
EXEFile: %ProgramFiles%\QUICKT~1\PictureViewer.exe %1
EXEFile: %ProgramFiles%\Notepad++\notepad++.exe %1