FIX: Could not install custom actions in Outlook 2007, 2010 (Solved).
If you face one of the following errors when trying to open an email item or Calendar in Outlook 2007 or 2010: "Could not install custom actions. The object could be found" or "The form required to view this message cannot be displayed" or "The form cache file 'FRMCACHE.DAT' is not valid, don't panic and continue reading below to fix it. Read More