Question external Devices like mouse , keybord ,cardreader etc.. not working

[saroj vs magnito]

please help me
I Have a Toshiba satellite C55-A5105 laptop with windows 8.1
my laptop serial number is "3E042909Q "
Automatically my external keyboard ,card reader and mouse stopped working but when i connect external hard disk it's working

PLEASE HELP ME

 

[helpstar]

reinstall the chipset drivers from Toshiba. Eventually update the BIOS as well