What is 'qhsusb_dolad' ?It is the situation when you can't boot into your phone,recovery mode and any other visible interface. When you connected your phone to the PC, the LED will flash and your PC will show that they were searching for the drivers needed(win7/8) but they couldn't find .......If it is commom for you to remove the battery when the phone did not shutdown completely or when you ran into 'No-Response' , as time goes by ,it will be inevitable that you come across the 'QHSUSB_DLOAD' situation . But from now on ,you needn't worry about that for I have found a way out. Tools needed: Hardware: A PC running XP and higher (win7/8 recommended) and your usb cable Software : MIflash and MIAssistent and a certain mi update rom(It is a *.exe file---fastboot file) Steps : 1. Install the first two softwares described above(Run as administrator) in your PC (You need to disable the enforcement of digital signature while on win8 in the advanced startup (press 7 or F7) 2.Boot into fastboot mode(you just need to do with your two buttons and usually you cann't see the interface for your screen just won't show in this situation) before connecting to PC 3.Connect you MI2/S to your PC via the usb cable and the pc will recongnise it in the device manager panel(if not, update its driver in the unknown device---qhsusb_dload) 4.Open the miflash and click fresh to load your phone's serial number 5.Flash the update rom(the self-extracted-to folder) into your phone and reboot . Explanations: Miassistant contains the 'qhsusb_dload' driver for any phone and it enables the PC(Miflash) to recongnise your CPU serial which is the key part of updating by wire. Tips: Try this with your other phone, I believe it will work ,too. Good luck ,guys !