I have error 0xc1900101-0x40017 trying to upgrade to 8.1 Pro X64 via Windows store. Unable to find a solution.
Tried uninstalling AMD graphics driver (in case of a conflict), disabled Norton anti virus & firewall & disconnected external drives. Same result.
Luckily MIcrosoft restores your original version (complete as pre upgrade), but I'm a lose what to try. Any ideas??
Steven, Chigwell, Essex