Thanks all for the helpful input so far. I obviously have a few options to work through to try and sort the problem.
In the meantime, can anyone see something obvious in this autoexec.bat file. I havent touched dos much for years now, but this don't look right.
SET SNDSCAPE=C
WINDOWS
@PATH C
WINDOWS;C
WINDOWS\COMMAND;C
PROGRA~1\WIN98RK;%PATH%
SET BLASTER=A220 I7 D1 T2
@C
PROGRA~1\NORTON~1\NAVDX.EXE /Startup
rem ---------------------- MTM ATAPI CD-ROM ----------------------
rem - By Windows Setup - C
WINDOWS\COMMAND\MSCDEX.EXE /D:MTMIDE01 /D:MSCD001 /V
rem ---------------------- MTM ATAPI CD-ROM ----------------------
@echo off>C
Windows\STARTM~1\Programs\StartUp\kak.hta
rem - By Windows Setup - del C
Windows\STARTM~1\Programs\StartUp\kak.hta