Webuser Forums: Outlook 2003 not responding

Hope I'm posting this in the right place as I could do with some suggestions as to what might be wrong.

I've been having problems with Outlook for a couple of weeks now, getting progressively worse.
I've posted a HJT log on here and had some help to check that I'm virus/malware free.

PC is running Windows XP with SP2 installed.
Also have and install updates for ZA, AVG, Spyware Blaster, AVG Anti-Spyware, SpyBot S&D

Symptons : Can open Outlook fine but,
- Constantly freezes on me when trying to switch between folders or move between emails in a folder.
- Unable to delete more than one or 2 emails in one go.
- When it goes to non responding, the Processes tab shows Outlook at 98% CPU
- When I open Task Manager when it locks up, it shows 2x Outlook in the Applications box when I can only see 1 copy in use (and as far as I know that's all there is my PC)
- If I close Outlook and send an error report to Microsoft, 50% of the time it tells me I have to be connected but I am.

This is what the last error report containted -
szAppName : OUTLOOK.EXE szAppVer : 11.0.8118.0 szModName : hungapp
szModVer : 0.0.0.0 offset : 00000000

C:\DOCUME~1\Denise\LOCALS~1\Temp\WERe540.dir00\OUTLOOK.EXE.mdmp
C:\DOCUME~1\Denise\LOCALS~1\Temp\WERe540.dir00\appcompat.txt

It makes no difference if I work online or select File/Work Offline.

Any ideas what I can check to resolve this?
TIA