This just started yesterday. I call up a list..lets say its Viedo-DVD.., I can make one or two scrolls using the scroll down tab...but if I pause for any length of time, the next scroll down will cause my computer to completely reboot as if you had cut the power. The computer reboots by itself.... after is does a disk check... then I can restart any programs I may have had open....Can somebody tell me what is going on here.