在尝试更新 Windows 11/10 设备上的程序时，您可能会遇到错误消息Windows Installer Service 无法访问或启动^{(Windows Installer Service could not be accessed or started)}，因为它可能安装不正确；当您打开服务控制台^{(open Services console)}进行故障排除时，您可能会发现缺少 Windows Installer 服务^{(Windows Installer Service is missing)}。这篇文章为这个问题提供了最合适的解决方案。

Windows 安装程序服务^{(Windows Installer Service)}丢失或不可用

如果您遇到此问题，您可以尝试以下我们推荐的解决方案（不分先后顺序），看看是否有助于解决问题。

1. 启用 Windows 安装程序服务
2. 运行 DISM 扫描
3. 重置 Windows 安装程序服务^{(Reset Windows Installer Service)}设置
4. 执行系统还原
5. 云重置^(Reset)或就地升级修复^{(In-place Upgrade Repair)}Windows 10

让我们看一下关于列出的每个解决方案所涉及的过程的描述。

1]启用Windows安装程序服务

如果您在 Windows 10 PC 上遇到此Windows Installer Service 缺失^{(Windows Installer Service missing)}问题，则可能是Windows Installer Service已禁用。在这种情况下，您可以尝试启用 msiserver，但由于它未在Services Manager中列出，您需要通过Command Prompt或Registry Editor启用 Windows Installer Service^{(enable Windows Installer Service)}。

2]运行DISM扫描

部署映像服务^{(Deployment Image Servicing)}和管理^(Management)( DISM ) 是修复有问题的Windows映像文件的强大实用程序。由于这些文件中的损坏可能导致此问题，您可以运行 DISM 扫描^{(run DISM scan)}并查看是否有帮助。

3]重置Windows Installer服务^{(Reset Windows Installer Service)}设置

此解决方案要求您在 Windows PC 的注册表中重置Windows Installer 服务^{(Windows Installer Service)}设置。

由于这是注册表操作，建议您备份注册表^{(back up the registry)} 或 创建系统还原点作为必要的预防措施。完成后，您可以执行以下操作：

• 从我们的服务器下载Reset_msiserver zip 文件。
• 解压缩存档包^{(Unzip the archive package)}。
• 双击Reset_msiserver.reg文件以将其合并到Windows 注册表^{(Windows Registry)}。
• 如果出现提示，请单击 Run > Yes  ( UAC ) >  Yes > OK 以批准合并。
• 您现在可以根据需要删除.reg文件。

4]执行系统还原

如果您在安装新的Windows更新后遇到此问题，您可以卸载更新^{(uninstall the update)}，或者您可以将系统恢复到问题之前的较早时间点，此时系统工作正常。

5]云重置^{(Cloud Reset)}或就地升级修复^{(In-place Upgrade Repair)}Windows 11/10

如果到目前为止上述解决方案均无效，您可以尝试Cloud Reset以重置每个Windows组件或执行就地升级修复，看看是否有帮助。如果这两个操作仍然不能解决问题，您可以全新安装 Windows^{(clean install Windows)}。

希望这可以帮助！

相关帖子^{(Related post)}：Windows 安装程序无法正常工作。^{(Windows Installer not working properly.)}

Windows Installer Service missing in Services Manager on Windows 11/10

While trying to update a program on your Windows 11/10 dеvice, you may run into the error message Windows Installer Service could not be accessed or started because it may be installed incorrectly; and when you open Services console to troubleshoot, you may discover that the Windows Installer Service is missing. This post offers the most suitable solutions to this issue.

Windows Installer Service is missing or not available

If you’re faced with this issue, you can try our recommended solutions below in no particular order and see if that helps to resolve the issue.

1. Enable Windows Installer Service
2. Run DISM scan
3. Reset Windows Installer Service settings
4. Perform System Restore
5. Cloud Reset or In-place Upgrade Repair Windows 10

Let’s take a look at the description of the process involved concerning each of the listed solutions.

1] Enable Windows Installer Service

If you’re encountering this Windows Installer Service missing issue on your Windows 10 PC, It’s possible that the Windows Installer Service is disabled. In this case, you can try to enable msiserver, but since it’s not listed in Services Manager, you will need to enable Windows Installer Service via Command Prompt or Registry Editor.

2] Run DISM scan

Deployment Image Servicing and Management (DISM) is a powerful utility in fixing the problematic Windows image files. Since corruption in these files can lead to this issue, you can run DISM scan and see if that helps.

3] Reset Windows Installer Service settings

This solution requires you to reset the Windows Installer Service settings in the registry on your Windows PC.

Since this is a registry operation, it is recommended that you back up the registry or create a system restore point as necessary precautionary measures. Once done, you can proceed as follows:

• Download the Reset_msiserver zip file from our servers.
• Unzip the archive package.
• Double-click the Reset_msiserver.reg file to merge it to the Windows Registry.
• If prompted, click on Run > Yes (UAC) > Yes > OK to approve the merge.
• You can now delete the .reg file if you like.

4] Perform System Restore

If you encountered this issue after installing a new Windows update, you can uninstall the update or you can restore your system to an earlier point prior to the issue, when the system was working correctly.

5] Cloud Reset or In-place Upgrade Repair Windows 11/10

If none of the above solutions has worked so far, you can try Cloud Reset to reset every Windows component or perform an In-place Upgrade Repair and see if that helps. If both of these actions still don’t resolve the issue, you can clean install Windows.

Hope this helps!

Related post: Windows Installer not working properly.

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