Same here - I have a BRAND NEW Zenbook UX455E - windows is telling me I can upgrade to windows 11 but it fails EVERY TIME - I have no peripherals plugged in, no 3rd party AV, its basically a new off the shelf device with loads of storage, latest drivers, latest version of windows 10 - but gets the 0xC199.... error EVERY time - this sucks Asus - SORT IT OUT!