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Description:  

Prevents users from viewing or installing published programs from the network.  

This setting prevents users from accessing the "Get Programs" page from the Programs Control Panel in
Category View, Programs and Features in Classic View and the "Install a program from the netowrk" task.  
The "Get Programs" page lists published programs and provides an easy way to install them.

Published programs are those programs that the system administrator has explicitly made available to the
user with a tool such as Windows Installer.  Typically, system administrators publish programs to notify users
of their availability, to recommend their use, or to enable users to install them without having to search for
installation files.

If this setting is enabled, users cannot view the programs that have been published by the system
administrator, and they cannot use the "Get Programs" page to install published programs.  Enabling this
feature does not prevent users from installing programs by using other methods.  Users will still be able to
view and installed assigned (partially installed) programs that are offered on the desktop or on the Start
menu.

If this setting is disabled or is not configured, the "Install a program from the network" task to the
"Get Programs" page will be available to all users.

Note:  If the "Hide Programs Control Panel" setting is enabled, this setting is ignored.

Supported on: At least Windows Vista.
Hide "Get Programs" page
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 ->
Control Panel -> Programs and open Hide "Get Programs" page.
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\Microsoft\Windows\CurrentVersion\Policies
\Programs
and locate NoGetPrograms 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 NoGetPrograms and edit the value:

To Enable:
Change the data value with:
NoGetPrograms = 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\Microsoft\Windows\CurrentVersion\Policies\Programs" /v NoGetPrograms /t REG_DWORD /d 1 /f

Not Configured:
REG DELETE "HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Programs" /v NoGetPrograms /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\Microsoft\Windows\CurrentVersion\Policies\Programs"
oReg.CreateKey HKEY_CURRENT_USER,strKeyPath
strValueName = "NoGetPrograms"
'Enabled
dwValue = 1
oReg.SetDWORDValue HKEY_CURRENT_USER,strKeyPath,strValueName,dwValue
'Not Configured
'oReg.DeleteValue HKEY_CURRENT_USER,strKeyPath,strValueName
PowerShell Script :          

Enabled

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

Not Configured\Disabled

$RegKey = "HKCU:\Software\Microsoft\Windows\CurrentVersion\Policies"
Remove-ItemProperty -Path($RegKey + "\Programs") -name NoGetPrograms
If( (Get-Item -Path($RegKey + "\Programs")).ValueCount -eq 0 -and (Get-Item -Path($RegKey + "\Programs")).SubKeyCount -eq 0)
{
 Remove-Item -Path($RegKey + "\Programs")   
}
Up Back
   
   
   
Result
By Default "Get Programs" is present under Start -> Control Panel -> Programs.
You can prevent users from using "Get Programs" using Group Policy or modify the specific registry key.  

Note: If you want to prevent a specific user from using "Get Programs" you need to modify or add the
registry key under his SID.