When I insert a CD sometime I get the following message C:\WINDOWS\SYSTEM32\AUTOEXEC.NT The system file is not compatible with the execution of MS-DOS or Microsoft Windows program. Is there a solution?

Error message when you install or start an MS-DOS or 16-bit Windows-based program (support.microsoft.com/default.aspx?scid=kb;en-us;324767)

Also read this thread (www.webuser.co.uk/cgi-bin/forums/showflat.pl?Cat=&Board=tips&Number=92053&page=0&view=collapsed&sb=5&o=14&part=).