I recently installed a Nvidia Ge Forced MX 4000 video card and associated software, which seems to have included a desktop manager that I basically did not need or want. I've disabled everything in its control panel that I can, but whenever I right click on a film clip to select the player I wish to use, I receive an error message: "The Nvidia Display Control Panel Extension cannot be created. Possible reasons include version mismatch. Reinstalling display drivers may solve the problem." That did not solve the problem. The error message disappears after four attempts to close it, and the normal right-click menu appears. The only Nvidia software appearing in the Remove Software panel is the Nvidia drivers. I'm using Xp Professional on a Compaq computer.