The Microsoft User Profile Hive Cleanup Service (UPHClean) ensures that user sessions are completely terminated when a user logs off. UPHClean cleans registry key handles that might be stranded by other processes and applications. This service helps to ensure that the user's registry hive is unloaded so that it can be uploaded successfully and the local persona can be deleted.
If you configure View Persona Management on Windows XP virtual machines, download and install UPHClean in the guest operating system.
You can download the UPHClean service at the following location: http://www.microsoft.com/download/en/details.aspx?displaylang=en&id=6676.
The UPHClean service is included with Windows 7 and Windows Vista operating systems. You do not have to install the service on these operating systems.