My SETI Screen saver stopped functioning after installing XP SP2 recently. 
I completely uninstalled SETI and attempted several times to reinstall it 
but nothing has worked yet.  The install process starts out fine but then I 
get the following message:

C;Windows\System32\Autoexec.nt The system file in not suitable for running 
MSDOS and Microsoft Windows applications.  Choose 'close' to terminate the 
application.

The other option given with this message is 'ignore'.  I have chosen that 
during my many attempts at installing and the install stalls for about 20 
seconds and  then ends.  I have searched my computer and the SETI folder 
does not exist.  Additionally, the option for using SETI in the screen saver 
portion of Windows does not exist.

Any ideas?  I'm running (or attempting to run) SETI on two computers it has 
quit on both since installing SP2.  The screen saver function did work 
initially after installing SP2 but has failed since then.  The only 
"changes" that have been made to either computer is installing Norton Virus 
Definitions.

Has anyone run into this problem?

Thanks!
David