Can anyone assist plse?

I have developed a problem where word crashes when I try
and open it. I cannot resolve which means that I cannot
use Word at all. I have Symantec viruses protection and
have done a live update within the last 24 hours and no
viruses were detected.

There seem to be 2 kinds of responses i am receiving:
1. 'Internat caused a General protection fault to User.Exe
at 00004 000002a6a'
2. 'Critically low resources' followed by various
programmes (inc word) not responding (i have seen 1 called
Nside 32 which i dont recognise).

I have run out of ideas

I have a Gateway Essential x86 that I purchased in
Australia. However, I am currently working in the UK on a
project and do not have my system or application disks
with me to refer to.

Any input greatly appreciated

Peter Townsley