my usb port is not responding to flash and hard drive.dont no wath to do
Refresh the USB Stack
a. Bring up - Device Manager –
b. Expand USB Serial Controllers - RIGHT CLICK on EVERYTHING and UNINSTALL
all except the category itself.
c. REBOOT the computer. This refreshes the drive and the USB stack
navigate down to USB Root HUB (all of them) > Right Click > Properties > Power Management Tab
Un check "allow the computer to turn off this device to save power".
Retry your USB device...It should work now...