I see that many of us had problems with updating and get stuck in the recovery mode. They have the 2 files in the root of the usb stick. I had this issue too.!! My solution was actually very easy. The usb stick i used was formatted in FAT32 but...... it says sdb5 that's not good, the 5 will means 5 pads or something and the b is also not good. you MUST have sda1. Then it works flawless. I formatted the usb stick with mini tool partition wizard and was set it to primery instead of logical. But that was my solution, get the sda1 when you press select.