How to fix .NET Framework 3.5 Error 0x800f081f in Windows 10

Error :-

HRESULT 0x800f081f when we are installing dot net framework 3.5 in Window 8 or in Windows 10

Method 1:
1) Open Command Prompt in Administrator Mode.

2) Excute this command :-

dism.exe /online /enable-feature /featurename:NetFX3 /all

Method 2 :-

if above method not work then try this download following file and execute following command in cmd

1) Download : http://www.alphaebarcode.com/Downloads/microsoft-windows-netfx3-ondemand-package.cab
3) copy past this file in C:\
3) Open cmd and execute this command
Dism.exe /online /enable-feature /featurename:NetFX3 /source:C:\ /LimitAccess