.NET 3.5 install through cmd without Windows Update in Windows 8.1

[johnultrakill]

Hello, I have a problem while installing .net 3.5 in 8.1
Pretty much like this thread I made a version without windows update
I have tried this but it says the source files could not be found (I do have a windows 8.1 iso mounted)

DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:D:\sources\sxs

Unlike the thread above, i only found folders in the iso, no .cab files, but it contains a lot of folders whose name is related to netfx, netfx35 (56 folders containing the name netfx35)

 

[garlin]

WinPE has a working DISM, separate from whatever WU components you removed from 8.1.

1. Find the 8.1 ISO, or make a new ISO from your image without autounattend.xml
2. Boot from ISO and stop. Shift-F10 to open a CMD window.

3. Check for the right drive letters for the live system, and ISO.

DISM /image:D:\ /Enable-Feature /FeatureName:NetFx3 /All /Source:F:\sources\sxs

4. Reboot the system.