.NET Framework 3.5 installation fails with 0x800F0954 error.

When trying to install .NET Framework 3.5 installation fails with 0x800F0954 error.

Cause to this problem is PC connecting to corporate service instead of Windows Update.

How to solve:

1. Disconnect PC from network (so PC won't pull GPO)

2. Change registry "HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU\UseWUServer" to 0

3. Restart PC

4. Connect PC to network

5. Install .NET Framework 3.5

6. Restart PC

7. Change registry

"HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU\UseWUServer" back to 1

8. Restart PC

Forced retrieval of Software Center applications

 1. Click on Machine Policy Retrieval & Evaluation Cycle and click on "Run Now."

2. Click on Application Deployment Evaluation Cycle and click on "Run Now."

3. Click on Software Updates Deployment Evaluation Cycle and click on "Run Now."

Fix: Error 0x800F0954

0x800F0954 As a temporary workaround, change the registry key “UseWUServer” to 0. It is located at: HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU

Error 0xc004F050 while entering Windows Pro product key

1. Disconnect from network

2. Enter generic key: VK7JG-NPHTM-C97JM-9MPGT-3V66T

3. Let Windows upgrade to Windows Pro

4. Connect to network

5. Activate with your Windows Pro key