dism /Mount-Image /ImageFile:install.wim /Index:1 /MountDir:C:\mount dism /Image:C:\mount /Add-Package /PackagePath:C:\temp\netfx3.cab dism /Unmount-Image /MountDir:C:\mount /Commit
Using an offline installer for .NET Framework 3.5 offers several advantages: Net Framework 3.5 Offline Installer Windows 10 64 Bit
| Error | Solution | |--------|----------| | – Source files not found | Double-check drive letter and that sxs folder exists. | | 0x800f0950 – DISM error | Run sfc /scannow then DISM /Online /Cleanup-Image /RestoreHealth before retrying. | | Installer hangs at 66.7% | Normal behavior – wait up to 10 minutes. | | Group Policy blocks installation | Check Computer Config → Admin Templates → System → Specify settings for optional component installation . | dism /Mount-Image /ImageFile:install