ccApp.exe and WinDbg

Hi,
After a lot of trial and error I discovered that my machine hangs if
ccApp.exe is started while the debugger is enabled.
ccApp.exe is the “Common Client User Session” of Symantec. It is added by
the Norton Antivirus Installer to
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run.

Is anyone else experiencing this or knows how to avoid the problem?

Thanks,
Shahar.