Fix Error 0x800F0954 Installing .NET Framework 3.5 or Any Optional Feature

[Fix] Error 0x800F0954 Installing .NET Framework 3.5 or Any Optional Feature

If the error 0x800f0954 occurs installing optional Windows features, it may be because the system is unable to access the Windows Update server. This is especially true in case of domain-joined computers which is configured to downloads updates from a WSUS server. It could also be possible that your computer was once a part or a corporate or domain network and the group policy setting is still in place.

Method 1: Bypass WSUS to Install Features/Updates Directly from Windows Update

To fix the problem, temporarily bypass WSUS server using the following registry edit (requires administrator privileges).

1. Right-click Start, and click Run
2. Type regedit.exe and click OK
3. Go to the following registry key:

   HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU

4. On the right-pane, if the value named UseWUServer exists, set its data to 0
5. Exit the Registry Editor
6. Restart Windows.