a)You may want to open outlook in safe mode (start > run > outlook.exe /safe)

b)Open outlook .Go to help menu and click Detect and repair

c)you may also want to delete the email account and recreate it going to accounts

d) Repair PST : http://www.slipstick.com/problems/scanpst.htm

e)Also take a backup of all emails and go to control panel > mail > delete the profile and recreate one again

f)Check for spywares and virus

g)If nothing works out repair or reinstall office
go to control panel > add/remove programs > scroll down to office
click on change and repair or reinstall

h)If everything is fine , go to officeupdate.microsoft.com and d/l and install the latest updates

g)If nothing works try this patch office2000kb834005_outlook_hangs_on_exit.