Try the following:

Exit Outlook

Windows Key/R

Type the following:

%appdata%\microsoft\outlook

Rename the outcmd.dat file to outcmd.old

Windows Key/R

Type the following:

%userprofile%\Local Settings\Application Data\Microsoft\Outlook

Rename the extend.dat to extend.old

Try starting Outlook. If the problem persists, create a new profile. Insturctions << here >>

If the problem still persists, let me know.