Net framework 3.5 windows 10 error 0x800f0831 July 8, 2019 16 32 64 128 How to fix .net framework 3.5 error 0x800f081f in windows 11 0x800f0950 .net framework 3.5 windows 11 Windows 10 0x800f0831 Net framework 3.5 windows 10 install Net framework error 0x800c0006 windows 7