Consider the following scenario. In an application that is running on a Windows Vista-based computer, you try to map the HKEY_CLASSES_ROOT registry subtree to another registry subtree. For example, you try to map the HKEY_CLASSES_ROOT registry subtree to the HKEY_CURRENT_USER registry subtree. When the application calls the RegisterTypeLib API to register a type library, you may receive the following error message:

Access denied

Additionally, the RegisterTypeLib API returns the TYPE_E_REGISTRYACCESS (0×8002801c) value.

This problem occurs if User Account Control (UAC) is enabled, and the application is running under the Limited User Account.