I have a Dell Inspiron 15 n5050 laptop, 1.5 years old, with Windows 8 Pro installed on it.
Recently I have been having some problems with the USB ports. When I start my computer and insert any USB devices (mouse, pen drive, mobile) it doesn't work. A USB mouse makes my computer freeze for about 20 seconds.
But if I go to Device Manager (I can see some exclamation marks on the USB drivers) and uninstall all the USB drivers and scan for hardware changes, it reinstalls the USB drivers and starts working properly. Who knows why?
I have been experiencing this problem for the last two days. I upgraded Windows to Windows 8 nearly two weeks ago.
The problem repeats itself each time I shut down and start the computer again.