turned off Mobile Hotspot, open registry
HKEY_LOCAL_MACHINE\system\currentcontrolset\services\wlansvc\parameters\hostednetworksettings
deleted HostedNetworkSettings DWORD key and again turned on Mobile Hotspot.
turned off Mobile Hotspot, open registry
HKEY_LOCAL_MACHINE\system\currentcontrolset\services\wlansvc\parameters\hostednetworksettings
deleted HostedNetworkSettings DWORD key and again turned on Mobile Hotspot.