This is on my laptop Win 8.1 Pro 64 bit. Fences, Start 8, Cursor FX, Icon Packager and Shadow FX are the Stardock programs.
I uninstalled WindowBlinds, rebooted and installed the v10.4.6 beta and rebooted. Applied Naked Noir skin. Took a long time to apply, I would say about 2 or 3 minutes. Everything looked fine but if I put the cursor over the Task bar it would show busy and the start menu wouldn't open. Tried to open My Computer the cursor would show busy for about a minute then stop. No window would open then I noticed the cpu was pinned at 100%. I pressed ALT, Ctrl, Delete and brought up the Task Manager and there was nothing that was showing me why the cpu was so high. I tried to restart Windows Explorer but the button did nothing. So I rebooted from ALT, Ctrl, Delete it loaded fine but still had the same problems as above. Rebooted again and pressed Ctrl to shut off WB and did the uninstall-reinstall with v10.0.7 and it's fine.