Cannot get to fastboot/bootloader menu on xiaomi mi5 I have forgotten pattern/passcode for my brand new Xiaomi Mi5. So, I need to do a factory reset to recover the access. 

However, when I try to boot to the fastboot/bootloader menu (using power and volume keys, as instructed on other posts), it gets stuck at the screen showing the fastboot logo and a little white animal fixing the little android robot (which appears to be the fastboot logo). No menus are displayed for reset etc. It just doesn't go past this screen.

I've also tried installing the android SDK to try and run commands from PC command line, but -

a) I cannot find the commands

b) The device is not being recognised by the PC. But I'd rather just factory reset manually if possible, cause the SDK way looks complicated.
Can't you just use your google account to recover the locked phone?
Anyway, if not, keep the device on, the type in cmd adb devices

If the device is not displayed you should, in effect, flash a ROM, in order to use it again, if the phone asks for permissions give them to it and do adb reboot recovery

Then you can proceed to wipe the data