How to resolve Windows update error 0x800F081F

 You can see error 0x800F081F when you add windows feature or windows update.

 Firstly, you need a window media(DVD, USB) for resolving and as a administrator, run cmd.exe.
Execute follwing commander.

dism /online /enable-feature /featurename:netfx3 /all /source:e\sources\sxs /limitaccess

source:e\ is volume drive with windows media

After finishing progress, you can add windows feature and can update windows.

or


Run cmd.exe as a administrator
Input following command

dism.exe /online /cleanup-image /scanhealth

dism.exe /online /cleanup-image /restorehealth