<#
.Synopsis
   Enable and disable Windows Features on a client
.DESCRIPTION
   This script creates a list of enabled and disabled Windows Features on a Windows Client OS PC
   and toggles the state of the selected items so that enabled items become disabled and disabled items are enabled.
   It depends on DISM.  You must run it as an administrator.
.NOTES
    Alan Kaplan 5/20/2017
    ver 1.1 9/16/2017 added echo of command to screen
#>

## test for restart needed?

function Test-IsAdmin 
{
    ([Security.Principal.WindowsPrincipal] [Security.Principal.WindowsIdentity]::GetCurrent()).IsInRole([Security.Principal.WindowsBuiltInRole] "Administrator")
}

if (!(Test-IsAdmin))
{
    write-warning "Script requires admin privileges to run, quitting."
    pause
    Exit
}

#Map of Install states
$Install = @{
    1 = "Enabled"
    2 = "Disabled"
    3 = "Absent"
    4 = "Unknown"
}

#Get list of Windows features and install state from WMI, then send to Out-Gridview
Get-wmiobject -query 'SELECT * FROM Win32_OptionalFeature ' |
Sort-Object name | 
Select-Object @{
    Name = "FeatureName"
    Expression ={ $_.name }
},
@{
    Name="Description"
    Expression = { $_.Caption }
},
@{
    Name="State"
    Expression = { $Install[[int]$_.InstallState] }
} |
Out-GridView -Title "Select Features to Enable/Disable" -OutputMode Multiple -OutVariable TaskList

#Build and execute DISM command line to enable features
$Features = $null
if ($TaskList.count -eq 0)
{
    Write-Warning "Nothing to do, quitting"
    Pause
    Exit
}

$EnableList = $TaskList | 
    Where-Object -FilterScript {
        $_.State -eq "Disabled"
} 

if ($EnableList.featurename.count -gt 0) {
    $EnableList|
    Foreach `
        -Begin {$cmd = "DISM /Online /Enable-Feature"} `
        -Process {$Features += " /FeatureName:$($_.FeatureName)"} `
        -end {
        write-host "Running: $cmd $features /norestart" -ForegroundColor Green
        IEX "$cmd $features /norestart"
        }
}

#Build and execute DISM command line to disable features
$Features=$null
$DisableList = $TaskList | 
    Where-Object -FilterScript {
    $_.State -eq "Enabled"
} 

if ($DisableList.featurename.count -gt 0) {
$DisableList|
Foreach `
    -Begin {$cmd = "DISM /Online /Disable-Feature"} `
    -Process {$Features += " /FeatureName:$($_.FeatureName)"} `
    -end {
    write-host "Running: $cmd $features /norestart" -ForegroundColor Green
    IEX "$cmd $features /norestart" 
    }
}

Pause