I have posted this problem in another thread, but if I had seen this thread first, I would have posted it here. I have had the same problem. I do have the latest version of WindowBlinds, version 8.06. I am having MAJOR problems with WindowBlinds since the last few updates came out for Windows 8.1 in August and September. This morning I tried to install some updates from Windows Update, and I almost thought I was going to have to wipe out my hard drive and reinstall everything from scratch! My computer would not finish booting up -- it would start to load the desktop, and then it would keep flashing up a blue screen and then starting over loading the desktop. I couldn't even get System Restore to work! At first I wasn't even able to reboot in Safe Mode. After tinkering for a long time, I finally managed to get into Safe Mode. I could tell that it seemed to be when the taskbar changed colors, as it does when WindowBlinds loads, that the system was hanging. So, purely on a hunch as an act of desperation, I removed all of my Stardock software (Start8, ModernMix, Fences, and WindowBlinds) and then restarted my computer. That worked -- it booted up normally. So I decided to reinstall the Stardock applications one by one, to see which one was causing the problem. Start8, ModernMix, and Fences all worked just fine. But as soon I tried to reload WindowBlinds, the problems started again. Thankfully, this time, I was able to get into Safe Mode right away, uninstall WindowBlinds, and restart my computer. It came up fine after WindowBlinds was uninstalled So obviously, WindowBlinds is what is causing the problem.
I've had WindowBlinds on my computer for quite a long time, and I never had any problems with it until around August. So I feel sure that something from Windows Update has created a compatibility problem that wasn't there before. I did create a support ticket about it, #UGJ-662-24855.