I have a third party vendor that requested a change in the registry so their COM add in would work in Office: Registry Permissions (Word) Full Control permission to HKEY_LOCAL_MACHINE\SOFTWARE\MICROSOFT\OFFICE This appears to be a gigantic security risk, especially in an environment where the users are locked down and do not have admin rights, so I have two questions that need to be answered to reply to the vendor: 1. What documentation/security guide can I provide to the vendor that states that VERY BAD THINGS will/could happen after making such a global change? 2. Which registry key for Word 2007 should be changed to give the local users group full rights to the add in COM object at the most specific registry key? I have tried HKLM\Software\Microsoft Office\Word\Addins, but this didn't solve the issue. PS for a similar horror story of changing registry permissions given by untrained tech support see http://www.tomshardware.com/forum/9982-2-modified-registry-keys-restore-permissions I also respect and agree with the standard Microsoft advice for using registry tools: WARNING: Using the Registry Editor incorrectly can cause serious, system- wide problems that may require you to reinstall Windows to correct them. Microsoft cannot guarantee that any problems resulting from the use of the Registry Editor can be solved. Use this tool at your own risk.