StarDestroyer.Net BBS

I'm trying to install Quake III and i get this error

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.

This is going on a Windows XP.

Sounds like you have something funky running in the background.

Whats open?

Have you tried Win95/98 compatibility mode?