Error Message at startup (WINXP)

[keohane2050]

At startup I keep getting this message headed "16 bit windows subsystem".
E:\WINDOWS\SYSTEM32\AUTOEXEC.NT. The system file is not suitable for running MS-DOS and Microsoft Windows applications. Choose 'Close' to terminate the application.
What does the message mean, and how can I stop it happening every startup?

 

[MFDnNC]

XP Fix - http://www.visualtour.com/downloads/

Scroll down to get XP Fix
http://www.tech-forums.net/computer/topic/29806.html

 

[keohane2050]

XP Fix - http://www.visualtour.com/downloads/

Scroll down to get XP Fix
http://www.tech-forums.net/computer/topic/29806.html

Fantastic, thanks.