Problem opening certain programs

[Verve]

I get this error message when I attempt to open certain programs. One was a semi-old game, United States Air Force, and another was when I tried to open "sysedit" in run. All of these things used to work, but a while ago these popups started. Can anyone help?

 

[OS Dragon]

You may encounter to other similar error messages, but with different file names config.nt and Autoexec.nt. This issue may occur if one or more of the following files are missing or damaged:

Config.nt
Autoexec.nt
Command.com

To restore these files, download the above three files from here. Unzip and copy the missing file(s) to Windows\System32 folder. For more information, see article Error message when you install or start an MS-DOS or 16-bit Windows-based program

Check this site out.

This issue which is showing-up lately, seems to be caused by a Trojan (may be TrojanDownloader.Win32.Dia.a) which seems to any of the three files indicated above. See this thread for more info.

 

[Verve]

Thanks I can get it on now. But now I have some error messages come up when I start "sysedit" Is this in any way related?
The same message pops up for the "Autoexe.bat" file