After the last update, something wrong happen to my type cover. It's not working when my pro4 wakes up from sleep. Reattach typecover resolved this issue as well. But 2 days before typecover stop working when I'm in the middle of work. My suface have popup said "one of the usb device attached to this computer has malfunctioned, and window does not recognise it" then even the light of the type cover not lightup any more. I tried every single way install driver, hard reset, reboot,... but nothing work. It's even not enable in UEFI. I'm hopeless now. Please help me.