Usb keyboard hang in windows 7

[Guest]

hi all
i use windows 7. i have usb mouse and keyboard. when i work in windows sudenly keyboard lock and i should un plug usb and plug in the keyboard usb again to unlock the keyboard. this happen with my mouse.
what can i do wiht this problem?

 

[soundguruman]

the system is powering off usb ports to save power? in the power management settings you can change the scheme to custom? turn off the usb power saver shutdown?
click start, click control panel,
at the top of this window is a bar that says: "control panel >"
on the far right of this bar is a down arrow
left click the down arrow
left click control panel/all control panel items
left click power options
left click create a power plan
I recommend you click balanced
left click change plan settings
left click change advanced power settings
left click + USB to expand usb settings
left click + USB selective suspend setting
left click settings
left click the down arrow, set USB suspend to disabled
click apply, click ok
recommend setting "put computer to sleep" to never
recommend setting "turn monitor off" to 45 minutes
left click save changes, restart computer