Fix NET Framework 3 5 installation Error: 0x800F0906, 0x800F081F, 0x800F0907
Go to windows installation source
Go to source folder
Copy SXS folder from the windows installation source to your c drive to prevent errors
make sure you have read access enabled to sxs folder in your c drive (to prevent 0x800f001f error)
open cmd as admin
navigate to c drive using cd c:\
put the command
dism /online /enable-feature /featurename:netfx3 /all /source:c:\sxs /limitaccess
you will get a message " the operation compleated successfully"