Install Dot net 3.5 offline

Dism /online /enable-feature /featurename:NetFx3 /Source:X:\sources\sxs /all /LimitAccess

You can try:

  1. Delete everything under: C:\Windows\SoftwareDistribution\Download
    Those are left over from Windows Updates and no longer needed.
  2. From Admin Command prompt, run:
    Dism /Online /Cleanup-Image /StartComponentCleanup
  3. Turn on Net Framework 3.5 from programs & Features again to see if it helps.


choco install dotnet3.5