Please open a command prompt (cmd.exe) as admin and run the following command to install .Net 3.5:
DISM /Online /Enable-Feature /FeatureName:NetFx3 /Source:d:\sources\sxs /All /LimitAccess
(replace D: with your mounted Win10 ISO)
In some environment, DISM fails to fetch the file (Proxy, network policies). The DISM command takes the files from the DVD and you're fine.
If you are MSDN subscriber you can also download the Windows 10 Features on Demand
ISO, mount the ISO, copy the Microsoft-Windows-NetFx3-OnDemand-Package.cab to C:\Features (or a different folder) and those commands:
DISM.EXE /Online /Add-Capability /CapabilityName:NetFx3~~~~ /Source:C:\Features
If this fails, run this:
DISM.EXE /Online /Add-Package /PackagePath:C:\Features\Microsoft-Windows-NetFx3-OnDemand-Package.cab
Have you tried solving this yourself ? A simple search leads me to this page
– pun – 2015-07-29T16:01:34.587Yes "No component store corruption detected". – Dunken – 2015-07-29T16:14:44.943
3run Dism DISM /Online /Enable-Feature /FeatureName:NetFx3 /Source:d:\sources\sxs /All /LimitAccess (replace D: with your mounted Win10 ISO). – magicandre1981 – 2015-07-30T04:42:27.383
@magicandre1981: that's it!! Thank you!! – Dunken – 2015-07-30T06:01:25.983
.NET Framework 3.5 installation error: 0x800F0906, 0x800F081F, 0x800F0907 lists possible solutions (the accepted answer being one of them). – Jakub Januszkiewicz – 2016-04-26T07:28:13.290
This also might help :
DISM.exe /Online /Cleanup-image /Restorehealth
– harrymc – 2017-09-20T08:33:49.743I had the same problem and I tried everything: various DISM commands, uninstalling the .NET 4.5, using Update Assistant, restarting million times, waiting the update for 100 hours — no success. Finally I installed a new version of Windows 10, not the 1809, but the 1709 version. With 1709 everything worked at once. – Sergey – 2019-11-19T17:19:29.837