Could not install the custom actions. The object could not be found." Error Starting Outlook

Delete the frmcache.dat file and start Outlook

1. Exit Outlook.
2. In Windows Explorer, open the following folder (depending on your version of Windows):
   
   Windows XP
   
   C:\Documents and Settings\username\Local Settings\Application Data\Microsoft\Forms
   
   Windows Server 2003, Windows Vista, or Windows 7
   
   C:\Users\username\AppData\Local\Microsoft\Forms
3. Delete the Frmcache.dat file.
4. Start Outlook.

Method 3: Repair your Office installation.

For detailed instructions on installing and repairing Office, see the following Knowledge Base Article:

How to install the individual 2007 Office features or to repair the installed 2007 Office programs
http://support.microsoft.com/kb/924611