We have reverted:
NT4 SP3 rather than SP4.
We have removed Compaq Insight Manager (with ADSMServer running, Insight
would crash. With ADSM Server NOT running, Insight runs OK).
We have deleted SURVEYOR.EXE (whatever that may be).
We have removed IE4, and are now using Netscape.
We now seem to be able to run for a couple of hours and do a couple of
backups - whether we can do more we will find out next week!

Cheers, Chris