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Frequently Asked Questions

The .NET 3.5 SP1 framework installation results in an error when installing OKTOPUS. How do I install it?

Affects Windows 8 / 8.1 / 10

Cause: In most cases, the .NET framework fails to install on domain-connected computers, as the server running Windows Server Update Services (WSUS) is unable to provide the appropriate files.

Solution: This can be solved by temporarily changing a registry value to bypass WSUS and directly obtaining the files from Windows Update online. Two methods are posted below, however many network administrators may wish to implement their own solution.

Registry Disclaimer: Modifying Registry settings incorrectly can cause serious problems that may prevent your computer from booting properly. Modifications of these settings are at your own risk and should only be performed by a network administrator.

Method 1: Manual Registry Change

  1. Right-click Start, and click Run

  2. Type regedit.exe and click OK

  3. Go to the registry key:
    HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU

  4. If "UseWUServer" exists in the right hand pane, make a record of the value. Edit it and set its data to 0.

  5. Restart the computer.

  6. Run the OKTOPUS installer again. This time it should succeed.

  7. To set the computer back to the original setting, follow steps 1-5 again, but change the registry value back to the original value as per your records in step 4.

Method 2: Command Prompt

  1. Click Start, type "cmd". In the list that is returned, right-click "cmd.exe" and choose "Run as Administrator". Choose "Yes" at the security prompt. This will open an elevated Command Prompt.

  2. Copy and paste the below into the CMD window. It will set the registry key to bypass WSUS, then stop and restart the Windows Update service.

    REG ADD “HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU” /v UseWUServer /t REG_DWORD /d 0 /f
    net stop “Windows Update”
    net start “Windows Update”


  3. Run the OKTOPUS installer again. This time it should succeed.

  4. To set the computer back to obtaining updates from WSUS, paste the following into the CMD prompt:

    REG ADD “HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU” /v UseWUServer /t REG_DWORD /d 1 /f
    net stop “Windows Update”
    net start “Windows Update”

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