Excel wont open with Norton and 3G running - help

Hi

I have cross posted this message as I don't have a clue where the problem
is.

One of my users has a Sony TX mini laptop (only a few weeks old). On there,
he has Office 2000, Norton Security Centre, and an O2 3G card. Under certain
conditions, Excel refuses to open. The conditions are as follows.

1. O2 3G card and program running, NAV running, cannot open Excel.
2. O2 3G card and program running, NAV disabled, can open Excel.
3. O2 3G card and program not running, NAV running, can open Excel.

This problem only started today. The user has shutdown fully and re-started,
to no avail. I know there are issues between NAV and Office add-ins, but not
sure if this is anything to do with it. Does anyone have any ideas?

Regards
Tom

It doesn't surprise. me. Some years back I lost a lucrative IT contract with
a major shofitting outfit through MS Office crashing repeatedly. They decided
on Norton. I didn't. Likewise machines would work fine for a day-or-two and
then start freezing every time a Word document was saved.

Basically there are any number of AV products on the market, AVG, Trend
Micro, McAfee, Sophos, E-Trust, Panda, F-Prot. Most do what they say on the
box. Take your pick. But avoid Norton.