I have been using ccleaner for more than 5 years and have never had any problems with it. I would like to recommend that if ccleaner doesn't find applicaitons such as google toolbar installed that it remove it from the registry so that the windows stops trying to load the update service.
The "information" below appears in the application log over and over, even when the google application is installed correctly and continues even after the application (in this case google toolbar) is uninstalled properly.
Event Type: Information
Event Source: gupdate
Event Category: None
Event ID: 0
Date: 1/5/2012
Time: 1:09:03 PM
User: N/A
Computer: PC171
Description:
The description for Event ID ( 0 ) in Source ( gupdate ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: Service stopped.
Although gupdate appears in the applications
and
Event Type: Information
Event Source: gusvc
Event Category: None
Event ID: 0
Date: 1/5/2012
Time: 12:13:50 PM
User: N/A
Computer: PC171
Description:
The description for Event ID ( 0 ) in Source ( gusvc ) cannot be found. The local computer may not have the necessary registry information or message DLL files to display messages from a remote computer. You may be able to use the /AUXSOURCE= flag to retrieve this description; see Help and Support for details. The following information is part of the event: Service started.