diff --git a/windows/win_dotnet_ngen.ps1 b/windows/win_dotnet_ngen.ps1
new file mode 100644
index 00000000000..52b4ebf82d5
--- /dev/null
+++ b/windows/win_dotnet_ngen.ps1
@@ -0,0 +1,69 @@
+#!powershell
+# This file is part of Ansible
+#
+# Copyright 2015, Peter Mounce <public@neverrunwithscissors.com>
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+$ErrorActionPreference = "Stop"
+
+# WANT_JSON
+# POWERSHELL_COMMON
+
+$params = Parse-Args $args;
+$result = New-Object PSObject;
+Set-Attr $result "changed" $false;
+
+function Invoke-NGen
+{
+    [CmdletBinding()]
+
+    param
+    (
+       [Parameter(Mandatory=$false, Position=0)] [string] $arity = ""
+    )
+
+    if ($arity -eq $null)
+    {
+        $arity = ""
+    }
+    $cmd = "$($env:windir)\microsoft.net\framework$($arity)\v4.0.30319\ngen.exe"
+    if (test-path $cmd)
+    {
+        $update = Invoke-Expression "$cmd update /force";
+        Set-Attr $result "dotnet_ngen$($arity)_update_exit_code" $lastexitcode
+        Set-Attr $result "dotnet_ngen$($arity)_update_output" $update
+        $eqi = Invoke-Expression "$cmd executequeueditems";
+        Set-Attr $result "dotnet_ngen$($arity)_eqi_exit_code" $lastexitcode
+        Set-Attr $result "dotnet_ngen$($arity)_eqi_output" $eqi
+
+        $result.changed = $true
+    }
+    else
+    {
+        Write-Host "Not found: $cmd"
+    }
+}
+
+Try
+{
+    Invoke-NGen
+    Invoke-NGen -arity "64"
+
+    Exit-Json $result;
+}
+Catch
+{
+    Fail-Json $result $_.Exception.Message
+}
diff --git a/windows/win_dotnet_ngen.py b/windows/win_dotnet_ngen.py
new file mode 100644
index 00000000000..90f464a1b0b
--- /dev/null
+++ b/windows/win_dotnet_ngen.py
@@ -0,0 +1,45 @@
+#!/usr/bin/python
+# -*- coding: utf-8 -*-
+
+# (c) 2015, Peter Mounce <public@neverrunwithscissors.com>
+#
+# This file is part of Ansible
+#
+# Ansible is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# Ansible is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with Ansible.  If not, see <http://www.gnu.org/licenses/>.
+
+# this is a windows documentation stub.  actual code lives in the .ps1
+# file of the same name
+
+DOCUMENTATION = '''
+---
+module: win_dotnet_ngen
+version_added: "2.0"
+short_description: Runs ngen to recompile DLLs after .NET  updates
+description:
+    - After .NET framework is installed/updated, Windows will probably want to recompile things to optimise for the host.
+    - This happens via scheduled task, usually at some inopportune time.
+    - This module allows you to run this task on your own schedule, so you incur the CPU hit at some more convenient and controlled time.
+    - "http://blogs.msdn.com/b/dotnet/archive/2013/08/06/wondering-why-mscorsvw-exe-has-high-cpu-usage-you-can-speed-it-up.aspx"
+notes:
+    - there are in fact two scheduled tasks for ngen but they have no triggers so aren't a problem
+    - there's no way to test if they've been completed (?)
+    - the stdout is quite likely to be several megabytes
+options:
+author: Peter Mounce
+'''
+
+EXAMPLES = '''
+  # Run ngen tasks
+  win_dotnet_ngen:
+'''