This question come up a lot, it is simple and there is nothing to worry about. It is part of ConvertXtoDVD, so uninstall this software or update it to the latest version. Caused by the Trial Version of ConvertXtoDVD and the retail version.
Symptoms include DVD driver not working. Comes up after operating system upgrades.
pcouffin device for amd 64 bits systems
Windows 7: pcouffin error