CCleaner Registry Scan

Could anyone please tell me why, everytime I carry out a registry scan with CCleaner it pics up the following item, and even when selecting to fix the item, an immediate or subsequent scan keeps highlighting the same item.

Invalid Default Icon C:\Program Files\Zone Labs\ZoneAlarm\UpdClient.exe,-279 HKCR\ZAMailSafe\DefaultIcon

Zone Alarm Pro is my legitimate firewall and is installed and working correctly. There is an icon on the desktop for it which I chose during the setup

installation. Other registry cleaners I use do not highlight the above item.

Any help greatly appreciated.

Thank you,

Jock.