Startup switch(es) enable users to launch Outlook 2010 with minimal resources, you can either block Outlook instances, modules, etc which are causing application crash or halt. OutlookTools is an add-on which lets user choose startup switches to run Outlook with specific commands to prevent any major damage.
On installed, launch the application and navigate to Startup Switches tab. Enable the switch option with which Outlook is to be started and click Start Outlook button.
It is must be noted here that some of the available switches don’t work with Outlook 2010.