For several weeks, I have after boot always a blue screen with the message BSOD PNP_DETECTED_FATAL_ERROR under Windows 8.1 64bit which is clearly caused by Norton Security. Bisland published an update, although known problem. Under Win7 but it runs without problems. Norton Security 2014 running under Windows 8.1 without problems. That's why now must first download a trial version of another manufacturer to show whether it works better -> runs without problems
Update 3/25/2015 since mid-December Symantec is working on a fix, until today no solution !!! Something called Support - hardly! Next year, another manufacturer will definitely take care of my equipment