hi Guys

please help. yesterday i was exploring my iphone and it seem to have crashed. and what i did was that i did a hard reboot and ever since then iPhone i snot getting recognised in itunes or windows. i have tried different USB ports on my comp but it doesnt recognise. i've tried to connect a usb pen drive to check if the USB port is functional or not. and it does get detected. i've done the usual check on the device manager for USB.everything seems to be fine. went to services.msc and the apple mobile device is 'started'

any suggestions. please help
thanks