I have looked through all the threads I could google about this and to no avail. Have tried reinstalling drivers and catalyst many times. Tried uninstalling the graphics card and rebooting. Tried disabling all my security software Net Framework is version 3.5SP1 Card: HD4850 OS: Vista home premium 64 bit When I try launching CCC the process appears in task manager but CC never starts up. Then after a min or so CCC.exe disappears from task manager also. I am currently using 9.4 drivers. The wierd thing is that it did work once and only once a while ago.