I get the same problem myself. I'm running a Pentium Extreme 965 (3.73GHz) with GeForce 7950, 2GB RAM and Soundblaster X-Fi Elite. I initially had the entire object desktop package installed, but kept having problems with freezing and explorer.exe not responding on shutdown. I uninstalled the whole deal, as I wasn't sure which program was causing it, and everything worked fine afterward. After reading the other threads regarding WFX, I installed everything again except for WFX and now I get error messages about other things, which I hope Stardock is working on right now, but no more explorer.exe hangs. Must still be a problem with WFX.