Event ID: 1530 may be logged in the Application log on a Windows Vista-based client computer

On a Windows Vista-based client computer, the following event may be logged in the Application log:

Log Name: Application
Source: Microsoft-Windows-User Profiles Service
Date: Date
Event ID: 1530
Task Category: None
Level: Warning
Keywords: Classic
User: SYSTEM
Computer: ComputerName

Description:
Windows detected your registry file is still in use by other applications or services. The file will be unloaded now. The applications or services that hold your registry file may not function properly afterwards.

DETAIL -
1 user registry handles leaked from \Registry\User\S-1-5-21-3112862306-1016156048-4130204762-1000: Process 932 (\Device\HarddiskVolume1\Windows\System32\svchost.exe) has opened key \REGISTRY\USER\S-1-5-21-3112862306-1016156048-4130204762-1000

This behavior occurs because Windows Vista automatically closes any registry handle to a user profile that is left open by an application. Windows Vista does this when Windows Vista tries to close a user profile.

In versions of the Windows operating system that are earlier than Windows Vista, you must install the User Profile Hive Cleanup Service (UPHClean) utility to have the same functionality. However, the UPHClean utility is incompatible with Windows Vista. Additionally, the UPHClean utility is not needed because this functionality is built into Windows Vista.

Note Event ID 1530 is logged as a Warning event. However, this behavior is expected. Usually, you can safely ignore this event.

This behavior is by design.