The .NET Framework 3.0 On-Demand Package CAB file contains the necessary files to install the .NET Framework 3.0 on a Windows Server 2012 R2 system. This package is usually required when you need to install an application that depends on the .NET Framework 3.0.
Or using DISM with the source switch:
While the on-demand .cab is a lifesaver, follow these best practices to avoid future headaches. | Error | Cause | Solution | |-------|-------|----------|
| Error | Cause | Solution | |-------|-------|----------| | 0x800f081f | Source files not found | Ensure CAB path is correct. Use DISM /Get-Packages to check if already partially installed. | | 0x800f0906 | Cannot download from Windows Update | Use DISM with /LimitAccess and /Source explicitly. | | 0x800f0922 | Disk space or corrupted image | Run DISM /RestoreHealth first, then retry. | | DISM fails with 0x800f0950 | Wrong CAB architecture (32-bit on 64-bit OS) | Verify you have the amd64 version of the CAB for Server 2012 R2 x64. | | | 0x800f0922 | Disk space or corrupted
