0x800F0950 and 0x800F0954: Features on Demand and language packs fail
0x800F0950 and 0x800F0954 mean the optional feature payload never arrived. Fix the source the client was told to use, or install from matching media.
0x800F0906 and 0x800F081F: .NET Framework 3.5 Will Not Enable on Windows
0x800F0906 means Windows cannot fetch the .NET 3.5 payload. Supply a matching install source with DISM and bypass the WSUS policy that blocks feature files.