Migrate MS Outlook Autocomplete cache to new PC or profile

The file is located under

C:\Documents and Settings\\Application Data\Microsoft\Outlook\
The folder C:\Documents and Settings\\Application Data\ is hidden and hence choose to show hidden files under “Folder Options”.
Once into the folder look for the file with the extension “NK2″. This filename will be “outlookprofilename.NK2″. For instance, on my PC, outlook profile name is “outlook” and hence the file name is “outlook.NK2″

Outlook 2007 -Removing an add-in that no longer exists?

Outlook 2007 -Removing an add-in that no longer exists?

Solution 1:
Delete "extend.dat", because the add-ins are cached there.

Go to My Computer (Windows Explorer)

Navigate the menus through: Tools | Folder Options | [View] tab | "Advanced Settings" section | Hidden Files and Folders

Tick (x) Show Hidden Files and Folders, and click [Ok]

In Windows Explorer, navigate to C:\documents and settings\{username}\Local Settings\Application Data\Microsoft\Outlook

Delete "extend.dat"

Close Windows Explorer, and reopen Outlook

Solution 2:

Use the Outlook 2007 Trust Center:
Open Outlook

Navigate the menus through: Tools | Trust Center... | Add-ins (on the left)

Ensure "COM Add-ins" is showing next to "Manage:", at the bottom of the dialog

Click [Go...]

Untick "[ ] The offending extension"

Click [Ok]

Restart Outlook and verify that it worked.