One of the things you should know about add-ins is that they slow down an application. For example, if you have several Internet Explorer add-ins, they can drastically slow down the start up time of your browsers.
The same thing applies to Outlook. Outlook add-ins can make the application load time very slow (and Outlook isn’t all that fast to begin with). If you find that Outlook takes an unusually long time to start up, you should take a look at the add-ins currently installed and disable those that you don’t need.
To disable an add-in in Outlook:
- Within Outlook, click Tools and then click Trust Center.
- From the Trust Center window, click Add-ins.
- Click the Go button beside Com Add-ins.
- From the window that appears, you can disable any add-in that you aren’t using by clearing the check box beside it.
- Click OK.