I have recently started to get new error messages while trying to setup some program (e.g. Snooker 147) in my computer. The error msg seems to be related to DOS based apps. It says "C:\WINDOWS\SYSTEM32\AUTOEXEC.NT. The system file is not suitable for running MS-DOS and Microsoft Windows applications. Choose 'Close' to terminate the application. " Then it shows Close and Ignore options. I tried both options, but nothing let me go ahead. Any solution please?