在Windows 10 操作系统^{(Operating System)}上安装和更新应用程序时，指定为C:\Windows\Installer的隐藏目录用于存储Microsoft Installer (MSI) 文件和Windows Installer Patch (MSP) 文件^{(Windows Installer Patch (MSP) files)}。在这篇文章中，我们将介绍您可以轻松安全地从Windows 10中的^{(Windows 10)}Windows Installer文件夹中清理未使用的MSI 和 MSP 文件^{(MSI and MSP files)}的各种方法。

如果您使用任何适用于Windows 10的可用^{(Windows 10)}磁盘空间分析器软件^{(Free Disk Space Analyzer software)}来查找占用驱动器多余空间的内容，则可能会显示C:\Windsows\Installer文件夹就是其中之一。如果您检查该文件夹，您很可能会在其中找到大量MSI和MSP文件，这些文件可能会占用数千兆字节的驱动器空间。

现在，当您在Installer文件夹中查看^(Installer)MSI和MSP文件的属性^(Property)详细信息时，这些可能表明它们已连接到当前安装的软件。其他可能来自您已卸载的软件或已被替换的旧版本。这些不再需要，可以安全地删除。

但是，难题在于识别这些MSI和MSP文件，因为不鼓励仅删除任何MSI或MSP文件，因为更新、修补或卸载现有应用程序可能需要这样做，并且这样做可能会在将来导致需要重新安装的严重问题的Windows 10。

尽管如此，有几种方法可以让您更安全地识别和删除Windows 10中^{(Windows 10)}Windows Installer文件夹中的冗余MSI和MSP文件——我们将在下面介绍它们。

注意^(Caution)：在决定删除任何文件之前要小心，并记住在继续之前先创建系统还原点。如果您不确定，最好不要删除任何内容。

^(Clean)从Windows Installer文件夹中清理未使用的MSI和MSP 文件^{(MSP Files)}

在这篇文章中，我们将重点介绍 3 个实用程序，用于清理Windows 10中^{(Windows 10)}Windows Installer文件夹中未使用的 .MSI 和 .MSP 文件。他们是：

1] WInstCleaner.ps1 PowerShell脚本

使用WInstCleaner.ps1 PowerShell脚本，您可以手动挖掘C:\Windows\Installer folder并确定哪些文件是孤立的并且应该可以安全删除。因为仍然注册的补丁文件将在注册表中有相应的条目，那些丢失的不再需要。

PowerShell脚本会显示您不应从Windows Installer文件夹中删除的文件，因为它们仍在使用中，不在列表中的文件可以安全删除。

WInstCleaner.ps1可在此处从 microsoft.com 下载^{(download from microsoft.com)}。

2]补丁清理器

Patch Cleaner专门用于清除Installer文件夹中的冗余文件。Patch Cleaner于 2015 年出现，但自 2016 年以来没有更新，因此可以肯定地说该程序不再处于开发阶段。

PatchCleaner便携版和安装版可供下载^(download)。

3] Windows Installer未使用的文件清理工具^{(Files Cleanup Tool)}

KZTechs的Windows Installer 未使用文件清理工具 (WICleanup)^{(Windows Installer Unused Files Cleanup Tool (WICleanup))}可以扫描^(KZTechs)Windows Installer文件夹中的孤立^{(Windows Installer)}MSI和MSP文件，并为您提供通过图形用户界面 ( GUI )删除它们的选项。对于脚本和命令行使用，WICleanup还在存档中包含命令行版本 ( WICleanupC.exe )。

要使用WICleanup，您只需解压缩下载的 ZIP 文件^{(extract the downloaded ZIP file)}，运行WICleanupUI.exe，然后单击“扫描^(Scan)”按钮。窗口中显示的所有条目都是孤立文件，并手动选中要删除的框。

WICleanup可在此处下载^(download)。

提示^(TIP)：这篇文章将帮助您解决缺少 Windows 安装程序缓存文件的问题。

With these 3 tools, you can clean up unused MSI and MSP files from the Windows Installer folder on Windows 10!

Clean up unused .MSI and .MSP files from Windows Installer folder

When applicationѕ are installed and updated on the Windows 10 Operating System a hіdden directory designated as C:\Windows\Installer is used to store the Microsoft Installer (MSI) files and the Windows Installer Patch (MSP) files. In this post, we will present the various ways in which you can easily and safely clean up unused MSI and MSP files from the Windows Installer folder in Windows 10.

If you use any Free Disk Space Analyzer software for Windows 10 to find what is taking up excess space on your drive, it might show that the C:\Windsows\Installer folder is one of them. If you check the folder, you will most likely find a lot of MSI and MSP files in there possibly consuming gigabytes of drive space.

Now, when you view the Property details of MSI and MSP files in the Installer folder, these could show that they are connected to software currently installed. Others might be from the software you have uninstalled or old versions that have since been replaced. Those are no longer needed and can be safely deleted.

However, the conundrum is identifying these MSI and MSP files because just deleting any MSI or MSP file is not encouraged as it could be required for updating, patching, or uninstalling existing applications and doing so may cause serious problems in the future that necessitate a reinstallation of Windows 10.

Nevertheless, there are a few ways in which you can more safely identify and delete redundant MSI and MSP files from the Windows Installer folder in Windows 10 – we present them below.

Caution: Be careful before you decide to delete any files and remember to create a system restore point first before you proceed. If you are unsure, best not to delete anything.

Clean up unused MSI & MSP Files from Windows Installer folder

In this post, we will highlight 3 utilities to clean up unused .MSI and .MSP files from the Windows Installer folder in Windows 10. They are:

1] WInstCleaner.ps1 PowerShell script

With the WInstCleaner.ps1 PowerShell script, you can manually dig into the C:\Windows\Installer folder and determine which files are orphaned and should be safe to delete. Because the patch files still registered will have a corresponding entry in the registry, those that are missing aren’t necessary anymore.

The PowerShell script shows you the files that you SHOULD NOT delete from Windows Installer folder as they are the ones still in use, those not in the list are safe to remove.

WInstCleaner.ps1 is available here for download from microsoft.com.

2] PatchCleaner

Patch Cleaner is specifically designed to clean redundant files from the Installer folder. Patch Cleaner appeared in 2015 but there have been no updates since 2016, so it’s safe to say the program is no longer in development.

PatchCleaner portable and installer versions are available for download.

3] Windows Installer Unused Files Cleanup Tool

The Windows Installer Unused Files Cleanup Tool (WICleanup) by KZTechs can scan for orphaned MSI and MSP files in the Windows Installer folder and offers you an option to delete them via the graphical user interface (GUI). For scripts and command-line usage, WICleanup also includes a command-line version in the archive (WICleanupC.exe).

To use WICleanup, all you need to do is extract the downloaded ZIP file, run the WICleanupUI.exe, and click the Scan button. All the entries that show in the window are orphaned files and manually check the boxes for what you want to delete.

WICleanup is available here for download.

TIP: This post will help you troubleshoot Missing Windows Installer Cache files.

With these 3 tools, you can clean up unused MSI and MSP files from the Windows Installer folder on Windows 10!

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