Eureka! Went to the Microsoft site and got the name of the actual driver (I think someone may have posted it here as well....just can't remember where)Tpkd.sys. I do indeed have it under Windows/system32/drivers. What happens if you simply "delete" this driver? Or is that more dangerous than running the developer file? I'm not getting the errors described in the Microsoft Knowledge base, so at this time am not experiencing any problems that could be directly related to this thing. The solution Microsoft offers is different I think than what's been proposed by Cliff,as they provide a link to download the driver updates....this assumes you really want and need this bugger :) At the PACE site (http://www.paceap.com/)there is a list of companies that use this. Corel is one of them, as is Adobe, Kodak, Pantone, Linotype, Kodak, Nikon, Dolby, Electronic Arts, Digidesign and Net Objects and of course, CL among others. Not sure which of the products these companies produce are affected. The only one that comes close for me is Corel, but I would guess Bryce 4 does not use it as it's not even listed as a product anymore....possibly Bryce 5 does though.