Windows 10: Net 3.5 framework, cannot install 0x800F081F.

Hi all,
i'm here to share the only workaround that worked for me (sorry for my english but i'm italian):
I encountered this problem today with this version

, i tried a lot of workaround but with no luck, even with the same iso used for installation. I get the same error in commad prompt and also in power shell,

(i think in english is unable to find source files).
Damn, it seems that the command line can't read the file for an unknown reason!
So tried to copy the netfx3 cab file on the desktop and i modified the command with the new path:
dism.exe /online /enable-feature /all /featurename:NetFX3 /Source:C:\Users\Username\Desktop /LimitAccess

and magically it worked *Cool

Cheers!

 

Wow, it was the file name I needed to change to get this to work. I've been looking for a solution for hours. Ultimately, it was this one that worked for me: dism /online /add-package /packagepath:R:\sources\sxs\microsoft-windows-netfx3-ondemand-package.cab

(R: is the volume for the Windows 10 DVD)

If I didn't specify the full name of the .cab file, it failed. All of the other suggestions that said to just specify the folder without also including the CAB file name failed for me.

 

Ah, the solution! Including the file name "microsoft-windows-netfx3-ondemand-package.cab" was the key to make it work for me. All the other DISM variants failed with similar errors. Adding the filename made it work. THANK YOU! THANK YOU!!