Loading Add-in fails

Hi,
This is a security message, please see if the user can run and access files in:
Documents and SettingsAll UsersApplication DataMicrosoftisualstudio8.0Addins

I had the same problem (under Windows XP Home). For running TypeMock you have to be a Power User, but that group isn't available for XP Home users. So you have to be either Administrator or, if you're only a Simple User, you must have full access to the registry entries of TypeMock (you can set them using the registy editor).