Vista - Outlook 2007 will not open

Hi, I am running Vista Ultimate 32 bit on a Dell Vostro 1500 Laptop with Itel Core2 Duo 2.2 GHz processors and 3GB ram. I have Microsoft Office 2007 and it has been running perfectly until a few weeks ago. Occasionally when I closed Outlook it would not open again without a system restart, now it will only open once and then i need to restart the system everytime it is closed before it will open again. I have checked microsoft for a solution, tried the repair option pn the setup disc but have had no luck. Microsofts error reporting function does not pick up any errors and therefore no solutions. I do not get any error messages. When you click on any of the Outlook icons or shortcuts it just thinks very briefly and then nothing. Any help would be greatly appreciated. Thanks newts350

Try removing than re-installing Office 2007/Outlook 2007. This will leave all data files intact and fix any errors.