Symtdi.sys - error 1075 for DHCP service

I have AV 2003 on a Win XP SP1 PC that suddenly stopped connecting

to the internet through my DHCP service.  The DHCP shows an error

1075 event in the logs due to SYMTDI.

 

Microsoft has a fix for this issue here :

 

http://support.microsoft.com/kb/915162

 

I have seen several online references to the problem being related

to uninstalling Norton Av which leaves reference to SYMTDI in the

registry thereby causing DHCP service to fail.  But I have not removed

my Norton AV 2003 and I still have the Symtdi.sys file in Windows.

 

So, I am wondering if I apply the fix to the registry as MS suggests,

well it matter that NAV is still on my PC?  I was cleaning up my hard

drive of a lot of trash files before this happened, but I deleted none that I knew

belonged to NAV.