Outlook+is+slow+to+open

The following are a list of things you can do to increase the overall speed of Outlook

Run Microsoft Office Diagnostics

 * Type Microsoft Office Diagnostics into the Start Menu run bar (Win 7)

Disable Outlook Addins

 * 1) On the **Tools** menu in outlook, click **Options** and then click the **Other** tab.
 * 2) Click **Advanced Options**, and then click the **Other** tab
 * 3) Clear the check box next to the add-in, then click **OK.**

Run Outlook in safe mode

 * In the Start menu run bar type: **outlook /safe**

Force Outlook to recreate the extend.dat file
Extend.dat keeps a registry cache of installed Exchange Client Extensions (ECE) add-ins and their status. Resetting this will force Outlook to retrieve the settings from the registry again and reset their status.


 * 1) Navigate to C:\Users\ \AppData\Local\Microsoft\Outlook on Vista/7 or C:\Documents and Settings\ \Local Settings\Application Data\Microsoft\Outlook on XP
 * 2) Rename extend.dat to extend.old
 * 3) Re-launch Outlook to force it to repair itself and recreate the extend.dat file

Run Ccleaner with the outlook boxes checked

 * 

Look for and delete large archive files

 * 1) Go to Control Panel > Mail
 * 2) Select and delete the data file paths

Force Outlook to use TCP/IP only when connecting to Exchange
> > Open regedit and navigate to the following key: HKLM\SOFTWARE\Microsoft\Exchange\ExchangeProviders > Modify the key, deleting removing everything but TCP/IP, leaving just ncacn_ip_tcp. > >
 * Outlook, by default, attempts to connect to Exchange servers with RPC (Remote Procedure Call,) TCP/IP, IPX/SPX, and even banyan vines. Meanwhile, the user is waiting for their message to display. Limiting Outlook to TCP/IP only will frequently make a world of difference in Outlook's responsiveness. To do that, you must edit the registry.