A hotfix is available that lets users disable the functions of the Personal Stationery dialog box in Outlook 2010

KB Article: https://support.microsoft.com/kb/2597038

INTRODUCTION

This hotfix lets users disable the functions in the Personal Stationery dialog box in Outlook 2010. After you install the hotfix, you can use the DisablePersonalStationery registry entry to disable the functions in the Personal Stationery dialog box.