Net 3.5 framework, cannot install 0x800F081F.

Hello everyone!
I tried everything that can be found on the internet, i tried to download from microsoft website, no luck, tried the offline install with the win 10 installer, nothing worked. I really need a fix, so please try to help me!

Try This

Also, try this:
Solved .Net 3.5 stuck in searching for updates, alternate method won't work - Windows 10 blog

Try This

Also, try this:
Solved .Net 3.5 stuck in searching for updates, alternate method won't work - Windows 10 blog

Sadly, i tried everything, topgundcp's command line, and microsoft's too, and now i tried again and got the 0x800F0906 error code now.

This is the error code if i try the offline with win 10 installer:
Error: 0x800f081fThe source files could not be found.
Use the "Source" option to specify the location of the files that are required to restore the feature. For more information on specifying a source location, see Configure a Windows Repair Source.
topgundcp's command gives me this error: Error: 6800

DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /E:sourcessxs
Where the E was the USB I used to do Win10 installation (E: should be whatever your drive letter is with the windows 10 ISO)
As letter case and spacing is very important, copy & paste the command into Notepad and change the drive letter only, then copy & paste into an admin command prompt.

DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /E:sourcessxs
Where the E was the USB I used to do Win10 installation (E: should be whatever your drive letter is with the windows 10 ISO)
As letter case and spacing is very important, copy & paste the command into Notepad and change the drive letter only, then copy & paste into an admin command prompt.

Error: 0x800f081f The source files could not be found.
Use the "Source" option to specify the location of the files that are required to restore the feature. For more information on specifying a source location, see Configure a Windows Repair Source.

This is the error i get, did everything i could.

Ok, this has always worked for me, but in the Microsoft Community, there is a thread I have been following, and there are other options. Maybe you want to read through it, and try some others(it's only six pages long): How to instal .Net Framework 3.5 on Windows 10

Ok, this has always worked for me, but in the Microsoft Community, there is a thread I have been following, and there are other options. Maybe you want to read through it, and try some others(it's only six pages long): How to instal .Net Framework 3.5 on Windows 10

Thanks! dism /online /add-package /packagepath:E:sourcessxsmicrosoft-windows-netfx3-ondemand-package.cab worked for me!

Great, you're welcome. Like I've said before, what works on one system, doesn't necessarily work on another.

DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /E:sourcessxs
Where the E was the USB I used to do Win10 installation (E: should be whatever your drive letter is with the windows 10 ISO)
As letter case and spacing is very important, copy & paste the command into Notepad and change the drive letter only, then copy & paste into an admin command prompt.

Thank you very much, for me it worked perfectly
I introduced the usb stick snd i started cmd with Administrator rights, i changed the location for usb stick with the right one, in cmd then paste the comad line hit "ENTER" and everything was solved in less than a minute.