I used to use Outlook Express before, but then the address book crashed and
couldn't be fixed even after reinstalling the IE package...

Then I switched to Outlook 2007 for daily emails, calendar & contacts.

After several days of normal operations, Outlook 2007 begins to respond very
very slowly, like it takes 10 seconds for every click to respond. So, I
uninstalled the whole MS office 2007 and reinstall it again. But this
doesn't help.

I used the MS office diagnose thing, but it says there is no problem... So,
what's wrong with the Outlook Express and Outlook 2007?!?!?! Please help!