NIS Appcrash - SYMHTML - fails after Norton Recovery also

I let 22.5.2.15 try to install only to be greeted with a crash in INSTSTUB (22.5.2.15) and "A problem caused the program to start working...".  Subsequent to that when I rebooted, 22.5.2.15 was installed after 2 reboots.  Then, when I click on the Norton Control Panel - the "You are protected" section, another app crash - SYMHTML.DLL again. 

It's showing SYMHTML.DLL as 10.0.0.224 - but in every single NIS crash, this DLL is there. 

I've tried Norton removal again - but now when I reboot to resume the install (the "Initializing" message shows), I get another app crash message "A problem caused the program.." - an in Event Viewer is SYMHTML.DLL again.

Anyone have any ideas?

Thanks.