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Description:  

Determines whether administrators can add and remove network components for a LAN or remote access
connection. This setting has no effect on nonadministrators.

If you enable this setting (and enable the "Enable Network Connections settings for Administrators" setting),
the Install and Uninstall buttons for components of connections are disabled, and administrators are not
permitted to access network components in the Windows Components Wizard.

Important: If the "Enable Network Connections settings for Administrators" is disabled or not configured, this
setting will not apply to administrators on post-Windows 2000 computers.

If you disable this setting or do not configure it, the Install and Uninstall buttons for components of
connections in the Network Connections folder are enabled. Also, administrators can gain access to network
components in the Windows Components Wizard.

The Install button opens the dialog boxes used to add network components. Clicking the Uninstall button
removes the selected component in the components list (above the button).

The Install and Uninstall buttons appear in the properties dialog box for connections. These buttons are on
the General tab for LAN connections and on the Networking tab for remote access connections.

Note: When the "Prohibit access to properties of a LAN connection", "Ability to change properties of an all
user remote access connection", or "Prohibit changing properties of a private remote access connection"
settings are set to deny access to the connection properties dialog box, the Install and Uninstall buttons for
connections are blocked.

Note: Nonadministrators are already prohibited from adding and removing connection components,
regardless of this setting.

Supported on: Microsoft Windows Server 2003, Windows XP, and Windows 2000 Service Pack 1 operating
systems only
Prohibit adding and removing components
for a LAN or remote access connection
Description Gpedit Regedit CMD Back VBScript PowerShell Script
Gpedit:   

Please perform the following steps:

Please go to Pearl button (Start) and click on the Search programs and files
For more information about the change from Start to Pearl button click here
Type gpedit.msc and press Enter
In the Group Policy window please navigate to User Configuration -> Administrative Templates ->
Network -> Network Connections and open Prohibit adding and removing components for a LAN or
remote access connection
.
Not Configured -> is the Default state
Enabled -> apply this GPO
Disabled -> this GPO will not be applied

To finish press ok button and close Group Policy window.
Type regedit and press ok
Please confirm User Account Control pop-up
Microsoft official disclaimer

Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by
using another method. These problems might require that you reinstall the operating system. Microsoft
cannot guarantee that these problems can be solved. Modify the registry at your own risk.

Note: This registry key is created by Group Policy when this GPO is Enable. The GPO Default state is Not
Configured -> this registry entry is not present. For Disable this registry entry is not present.

Please navigate to HKEY_CURRENT_USER\Software\Policies\Microsoft\Windows\Network Connections
and locate NC_AddRemoveComponents registry key
Regedit:          

Please perform the following steps:

Please go to Pearl button (Start) and click on the Search programs and files
For more information about the change from Start to Pearl button click here
   
   
Double click on NC_AddRemoveComponents and edit the value:

To Enable:
Change the data value with:
NC_AddRemoveComponents = 0

To Disable:
Change the data value with:
NC_AddRemoveComponents = 1

To finish press ok button and close Registry Editor window

Note: Manual editing of this registry key will not be reflected in Group Policy. If you modify this GPO from
Group Policy this registry key will be rewritten.
Type cmd, right click on cmd icon under the Programs and click on Run as administrator
Please confirm User Account Control pop-up
Please select, right and copy a registry key from below, then right click on command prompt window
, select Paste and press Enter

Enabled:
REG add "HKCU\Software\Policies\Microsoft\Windows\Network Connections" /v NC_AddRemoveComponents /t REG_DWORD /d 0 /f

Disabled:
REG add "HKCU\Software\Policies\Microsoft\Windows\Network Connections" /v NC_AddRemoveComponents /t REG_DWORD /d 1 /f

Not Configured:
REG DELETE "HKCU\Software\Policies\Microsoft\Windows\Network Connections" /v NC_AddRemoveComponents /f

Note: Manual editing of this registry key will not be reflected in Group Policy. If you modify this GPO from
Group Policy this registry key will be rewritten.
CMD:          

Please perform the following steps:

Please go to Pearl button (Start) and click on the Search programs and files
For more information about the change from Start to Pearl button click here
   
VBScript:          

Const HKEY_CURRENT_USER = &H80000001
strComputer = "."
Set oReg=GetObject("winmgmts:{impersonationLevel=impersonate}!\\" & _
strComputer & "\root\default:StdRegProv")

strKeyPath = "Software\Policies\Microsoft\Windows\Network Connections"
oReg.CreateKey HKEY_CURRENT_USER,strKeyPath
strValueName = "NC_AddRemoveComponents"
'Enabled
dwValue = 0
'Disabled
'dwValue = 1
oReg.SetDWORDValue HKEY_CURRENT_USER,strKeyPath,strValueName,dwValue
'Not Configured
'oReg.DeleteValue HKEY_CURRENT_USER,strKeyPath,strValueName
   
PowerShell Script :          

Enabled

$RegKey = "HKCU:\Software\Policies\Microsoft\Windows"
If(Test-Path ($RegKey + "\Network Connections"))
{
 $RegKey = "HKCU:\Software\Policies\Microsoft\Windows\Network Connections"
  ##Enabled
  New-ItemProperty -path $RegKey -name NC_AddRemoveComponents -value 0 -PropertyType DWord -Force
  ##Disabled
  ##New-ItemProperty -path $RegKey -name NC_AddRemoveComponents -value 1 -PropertyType DWord -Force
}
else
{
 New-Item -path $RegKey -name "Network Connections"
 $RegKey = "HKCU:\Software\Policies\Microsoft\Windows\Network Connections"
  ##Enabled
  New-ItemProperty -path $RegKey -name NC_AddRemoveComponents -value 0 -PropertyType DWord
  ##Disabled
  ##New-ItemProperty -path $RegKey -name NC_AddRemoveComponents -value 1 -PropertyType DWord
}

Not Configured\Disabled

$RegKey = "HKCU:\Software\Policies\Microsoft\Windows"
Remove-ItemProperty -Path($RegKey + "\Network Connections") -name NC_AddRemoveComponents
If( (Get-Item -Path($RegKey + "\Network Connections")).ValueCount -eq 0 -and (Get-Item -Path($RegKey + "\Network Connections")).SubKeyCount -eq 0)
{
 Remove-Item -Path($RegKey + "\Network Connections")  
}
   
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Result:

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Verify code.
Result