Thanks Scab: mine was enabled http://www.sevenforums.com/tutorials/778-power-plan-settings-change.html
Jack 
PS: I kinda think Zonzie’s problem may be more than this though.
Maybe USB 1.1 vs. USB 2.0 or even his Arturia factory software itself 
My Tascam US-1641 runs real jettery on my older XP computer that has USB.1.1
What he described above is what I experienced a couple of years ago. 