I am constantly (every few hours) getting the below error in my "Application" event log - why?

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 -
2 user registry handles leaked from \Registry\User\S-1-5-21-1916713488-2360789259-1967826530-1000:
Process 1668 (\Device\HarddiskVolume2\Program Files (x86)\CheckPoint\ZoneAlarm\vsmon.exe) has opened key \REGISTRY\USER\S-1-5-21-1916713488-2360789259-1967826530-1000
Process 1668 (\Device\HarddiskVolume2\Program Files (x86)\CheckPoint\ZoneAlarm\vsmon.exe) has opened key \REGISTRY\USER\S-1-5-21-1916713488-2360789259-1967826530-1000