can't install ntrack

When i try to install ntrack, quartz audiomaster,cakewalk pro,… I get the following message from16 bit
windows subsystem.

C:\windows|\system32\autoexec.nt. The system file is not suitable for running MS-dosand microsoft windows
applications.

I cannot install that programs now. These programs were prevoiusly installed on my system.Please help me to
find a solution

It sounds like a serious problem, like a virus, or that you have some system files corrupt. Have you any hardware problem (your hardisk is working ok, etc) that can help to know what happen?