I have an ATI card and the tools are always in my taskbar, with no issues whatsoever.
The ATI tray tools are not the problem, nor it's couatl, the real reason is that probably your system has a problem with c++ libraries that both the ati tools and couatl are using, and if there's something wrong with those, any products happening to use such libraries might conflict with each other.
Try to ensure everything is updated in Windows, this might fix the visual c++ libraries.