某些 PC 用户在更新 Microsoft Defender^{(updating Microsoft Defender)}或在其 Windows 10 或 Windows 11 设备上运行扫描时可能会遇到^{(running a scan)}Windows Defender 错误代码 0x8050800c 。^{(error code 0x8050800c)}如果您遇到类似问题，本文中列出的解决方案将帮助您解决问题。

当您遇到此问题时，您将收到以下完整错误消息；

An unexpected problem occurred. Install any available updates, and then try to start the program again. For information on installing updates, see Help and Support. Error code: 0x8050800c

如何修复Windows Defender错误？

当您在 Windows 10/11 计算机上遇到任何Microsoft Defender错误时，能否成功修复该问题取决于您收到的错误代码或消息。没有一刀切的解决方案，尽管一些通用解决方案可以适用于某些错误。我们已经广泛介绍了Microsoft Defender错误，因此请务必浏览这些资源。

Windows Defender错误代码 0x8050800c

如果您遇到此Windows Defender 错误 0x8050800c^{(Windows Defender error 0x8050800c)} 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. 重启电脑
2. 运行^(Run)第三方 AV 软件清除工具
3. 禁用定期扫描
4. 在干净启动状态下进行故障排除
5. 运行 DISM 扫描
6. 修复 Windows Defender

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。

在您尝试以下解决方案之前， 请检查更新^{(check for updates)}并在您的 Windows 10/11 设备上安装任何可用位，并查看在您尝试更新Microsoft Defender时错误是否再次出现。您还可以手动检查和更新 Microsoft Defender 定义^{(manually check for and update Microsoft Defender definition)}。

1]重启电脑

Restarting your Windows 10/11 PC可以轻松解决此问题。否则^(Otherwise)，请尝试下一个解决方案。

2]运行^(Run)第三方AV软件清除工具

此解决方案要求您使用专用删除工具^{(removal tool)}从 PC 中删除所有第三方防病毒程序，以删除与您的防病毒程序关联的所有文件。原因是，使用制造商提供的 AV 程序的自定义卸载工具（如果可用）更有效和更具侵入性，每当卸载防病毒软件时，因为存在注册表和依赖项，安装在传统控制面板^{(Control Panel)}卸载程序的操作系统深处(appwiz.cpl) 在大多数情况下可能会丢失。

3]禁用定期扫描

此解决方案要求您禁用^{(disable periodic scanning)}Windows 设备上的定期扫描。

4]在干净启动状态下进行故障排除

此解决方案要求您使用最少的驱动程序和启动程序集执行 干净启动^{(Clean Boot)}以启动Windows 。这有助于消除安装程序或更新或在Windows PC 上运行程序时发生的软件冲突。

5]运行DISM扫描

由于这可能是Windows更新系统文件损坏的情况，因此此解决方案需要您使用Windows操作系统原生的DISM工具来修复损坏的 Windows 更新系统文件。

如果这对您不起作用，请尝试下一个解决方案。

6]修复Windows Defender

最后但并非最不重要的一点是，您可以下载并使用我们的免费软件FixWin来修复Windows Defender并将所有Windows Defender设置重置为默认值。修复^(Repair)设置可以在实用程序 UI的系统工具选项卡下找到。^{(System Tools)}

希望这可以帮助！

如何修复被组策略^{(Group Policy)}阻止的Windows Defender？

如果Windows Defender 被组策略关闭，则更改关闭 Windows Defender 防病毒^{(Turn off Windows Defender Antivirus)}设置可以帮助您在任何一天登录您的计算机。

Fix Windows Defender error code 0x8050800c on Windows 11/10

Some PC users may encounter Windows Defender error code 0x8050800c while updating Microsoft Defender or running a scan on their Windows 10 or Windows 11 device. If you’re experiencing a similar issue, the solutions outlined in this post will help you resolve the issue.

When you encounter this issue, you’ll receive the following full error message;

An unexpected problem occurred. Install any available updates, and then try to start the program again. For information on installing updates, see Help and Support. Error code: 0x8050800c

How do I fix Windows Defender error?

When you encounter any Microsoft Defender error on your Windows 10/11 computer, to successfully fix the issue depends on the error code or message that you have received. There’s no one-size-fits-all solution, although some general solutions can apply to some errors. We have extensively covered Microsoft Defender errors – so be sure to browse for these resources.

Windows Defender error code 0x8050800c

If you’re faced with this Windows Defender error 0x8050800c issue, you can try our recommended solutions below in no particular order and see if that helps to resolve the issue.

1. Restart PC
2. Run third-party AV software removal tool
3. Disable Periodic Scanning
4. Troubleshoot in Clean Boot state
5. Run DISM scan
6. Repair Windows Defender

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

Before you try the solutions below, check for updates and install any available bits on your Windows 10/11 device and see if the error reappears when you attempt updating Microsoft Defender. You may also manually check for and update Microsoft Defender definition.

1] Restart PC

Restarting your Windows 10/11 PC can easily resolve this issue. Otherwise, try the next solution.

2] Run third-party AV software removal tool

This solution requires you to remove all third-party antivirus programs from your PC using the dedicated removal tool to remove all files associated with your antivirus program. The reason is, it’s much more efficient and invasive to use the custom uninstall tools for the AV program from the manufacturer, if available, whenever uninstalling antivirus software, as there are registries and dependencies, installed deep within the OS which the traditional Control Panel uninstaller (appwiz.cpl) might miss in most cases.

3] Disable Periodic Scanning

This solution requires you to disable periodic scanning on your Windows device.

4] Troubleshoot in Clean Boot state

This solution requires you to perform a Clean Boot to start Windows by using a minimal set of drivers and startup programs. This helps eliminate software conflicts that occur when you install a program or an update or when you run a program on your Windows PC.

5] Run DISM scan

As this could be a case of corrupted Windows update system files, this solution requires you to use the DISM tool, native to the Windows operating system, to fix corrupted Windows update system files.

Try the next solution if this didn’t work for you.

6] Repair Windows Defender

Last but not the least, you can download and use our freeware FixWin to repair Windows Defender and reset all Windows Defender settings to default. The setting to Repair can be found under the System Tools tab of the utility UI.

Hope this helps!

How do I fix Windows Defender blocked by Group Policy?

If Windows Defender is turned off by Group Policy changing the Turn off Windows Defender Antivirus setting can help you if you log into your computer on any given day.

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