dwarvy

I had this same problem with my Razer Deathstalker. I ended up smashing it and accidentally broke the space bar one day when I was in a hurry and was fed up with unplugging and plugging it in. Lol I would try going into device manager and making sure that the mouse does NOT have the "Allow the computer to turn off this device to save power" box checked. (under properties->power management) Other than that I would try swapping USB ports, installing/reinstalling Razer Synapse, and doing windows updates. Mine fixed itself eventually - I suppose with updates. Good luck!

I am having this exact same problem. Although when I unplugged all of my drives, my system is still hanging... Guess my only option is a fresh install of windows. My system was running fine all day, then gave me a blue screen when I tried to open Internet Explorer (guess I'll be using only Chrome from now on) and I haven't been able to boot into Windows since. I hadn't installed any programs or games that day that could have corrupted classpnp.sys, so I guess I only have IE to blame. Seems like a very rare problem.

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