Event ID - 1524

Event Id1524
SourceUserenv
DescriptionWindows cannot unload your classes registry file - it is still in use by other applications or services. The file will be unloaded when it is no longer in use.
For more information, see Help and Support Center at http://go.microsoft.com/fwlink/events.asp.
Event InformationAccording to Microsoft:
CAUSE:

This issue may occur if Microsoft Windows or third-party programs such as printer drivers or virus scanners do not stop and release resources when you log off your computer.
RESOLUTION :
To resolve this issue, use the Microsoft User Profile Hive Cleanup Service (UPHClean). UPHClean monitors the computer while Windows is unloading user profiles and forces resources that are open to close. Therefore, the computer can unload and reconcile user profiles.
Reference LinksTroubleshooting profile unload issues

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