Hi
So the first step will be to deactivate all the energysaveoptions Win7 has by default, also usb ports should always have full energy.
To begin, open your control panel from your Start menu.
Click on Hardware and Sound
On the left side of the screen, select Create Power Plan
Select the High Performance radial
In the name field, call your plan whatever you would like
Change the Put Computer to Sleep field to Never
Click on the Create button to create your custom plan.
Once back on the main Power Options screen, select Change Plan Settings
Next click the blue Change Advanced Power Settings link
Open the hard disk power options, by clicking on the + next to Hard Disk
Change the time listed under Turn Off Hard Disk After to 0
Under the Sleep options you should change Sleep and Hibernation both to 0 as well
Click on OK and close the window.
Your power management settings have been set to disabled
Hope this might help
And for Usb check the device manager
Make shure all is deactivated
Greetz Bassbase