My iphone can't detected by my laptop and desktop pc (in all usb ports)?

Just from last 2-3 hours my laptop and pc says-"usb device not recogniced'. Same problem with all usb ports

This happened to me,
update your iTunes to the latest and it'll work

First please check that your all usb are working or not? Check it with other usb device like pendrive or usb mouse or else. If its also not working then there's a problem with your laptop.

and if its working fine then please first uninstall your iphone software from your laptop desktop, and download latest software and then install it. (please first uninstalled your old software and then you must restart your system then again install new software), after then check it please.

and if still its not working then please check your usb cable of iphone, change it and cross check it please.