well I've read a little bit on the net.
but long story short this guy http://www.techspot.com/vb/topic74923.html
deinstalled it (sony software) at the end.
it was stated that some win hotfix could be the cause.
maybe you'll find something on sony.com, I doubt
if you do not use it, deinstall it, if you do use it deinstall every april hotfix (5/april-10; 1/april-3) separately and reboot each time. as it will crash let the pc boot and shut it down again to see if it is gone. if not deinstall the second one and so on.
edit:
931784
930178
932168
931261 probably the badass
925939
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