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windows-itpro-docs/windows/security/threat-protection/windows-defender-application-control/applocker/windows-installer-rules-in-applocker.md
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---
title: Windows Installer rules in AppLocker (Windows)
description: This topic describes the file formats and available default rules for the Windows Installer rule collection.
ms.assetid: 3fecde5b-88b3-4040-81fa-a2d36d052ec9
ms.reviewer:
ms.author: macapara
ms.prod: m365-security
ms.mktglfcycl: deploy
ms.sitesec: library
ms.pagetype: security
ms.localizationpriority: medium
author: mjcaparas
manager: dansimp
audience: ITPro
ms.collection: M365-security-compliance
ms.topic: conceptual
ms.date: 09/21/2017
ms.technology: mde
---
# Windows Installer rules in AppLocker
**Applies to**
- Windows 10
- Windows 11
- Windows Server 2016 and above
>[!NOTE]
>Some capabilities of Windows Defender Application Control are only available on specific Windows versions. Learn more about the [Windows Defender Application Control feature availability](/windows/security/threat-protection/windows-defender-application-control/feature-availability).
This topic describes the file formats and available default rules for the Windows Installer rule collection.
AppLocker defines Windows Installer rules to include only the following file formats:
- .msi
- .msp
- .mst
The purpose of this collection is to allow you to control the installation of files on client computers and servers through Group Policy or the Local Security Policy snap-in. The following table lists the default rules that are available for the Windows Installer rule collection.
| Purpose | Name | User | Rule condition type |
| - | - | - | - |
| Allow members of the local Administrators group to run all Windows Installer files| (Default Rule) All Windows Installer files| BUILTIN\Administrators| Path: *|
| Allow all users to run Windows Installer files that are digitally signed | (Default Rule) All digitally signed Windows Installer files| Everyone| Publisher: * (all signed files)|
| Allow all users to run Windows Installer files that are located in the Windows Installer folder | (Default Rule) All Windows Installer files in %systemdrive%\Windows\Installer| Everyone| Path: %windir%\Installer\*|
## Related topics
- [Understanding AppLocker default rules](understanding-applocker-default-rules.md)