Yesterday, Microsoft released a security update to Windows 7 that had the unfortunate side effect of crashing Microsoft Outlook. Last night Microsoft reissued the faulty Windows update (KB3097877). Our testing has confirmed that the new update overwrites the faulty one and fixes the Outlook problem.
Whether or not Outlook is crashing on your computer, you should run Windows update manually until you have no further important updates left to install. How to update Windows 7 manually and keep it up to date automatically.