QUOTE (ncaster @ Aug 25 2008, 05:05 AM)

Is there a way to run it in a complete silent mode?
On Windows XP (I don't know about Vista) you can have the tray notifications icons hidden at all times.
To do this with Customize Notifications:1. Right click the
Taskbar and select
Properties.
2. Click
Customize.
3. Find
CCleaner, then use the drop down box and select
Always hide.
4. Then to finish keep clicking OK to exit Customize Notifications.
Note that this may or will cause some temporary problems with running browsers like Firefox if the user doesn't know CCleaner is running! Closing Firefox, then running CCleaner again, and then finally reopening Firefox will fix the issue.