and you look at the performance tab in the task manager that it is not just busy?
sorry just ran a chkdsk came back no errors.
i loaded win8.1 and it did this also. i have tried using different video cards differeent mobo different ram and different hd.
ive been building my own machines for 10 yrs and never had this one happen. im so lost.
in response to your question, no.not busy.