始终建议您定期更新您的 Windows 10 操作系统，以便您可以继续以流畅且无可挑剔的方式操作您的计算机。但一些用户报告在尝试安装Windows 更新^{(Windows Update)}时遇到更新错误代码 643 。具体来说，当您尝试安装.NET Framework的更新时，您可能会收到Windows 更新错误代码 0x643 或 0x80070643^{(Windows Update error code 0x643  or 0x80070643)}。此错误代码通常是由.NET Framework安装损坏或MSI数据库状态不一致引起的。

此更新错误代码会阻止您更新 Windows 更新，并可能最终使其无法使用。错误^(Thee)消息也可以以下格式显示：

Error(s) found: Code 643 Windows Update encountered an unknown error.

在本指南中，我们进行了一些简单的调整，可能会帮助您修复此错误。所以让我们开始吧。

Windows 更新错误代码 643

要修复Windows 更新错误代码 643^{(Windows Update Error Code 643)}，请遵循以下建议：

1. 运行Windows 更新疑难解答^{(Windows Update Troubleshooter)}
2. 修复 Microsoft .NET Framework
3. 使用Microsoft .NET Framework 清理实用程序^{(Microsoft .NET Framework Cleanup Utility)}。

在开始之前，首先创建一个系统还原点。如果出现不受欢迎的地方，它将帮助您恢复更改。

现在让我们看看如何详细修复错误代码 643^{(Error Code 643)}。

1]运行^(Run)Windows更新^{(Windows Update Troubleshooter)}疑难解答

Windows 10 附带一个内置的疑难解答工具，可以诊断和修复与Windows更新相关的常见问题。

为了修复此错误代码，您可以运行 Windows 更新疑难解答 或使用Microsoft 的在线疑难解答^{(Microsoft’s online troubleshooter)}方法。然后检查此方法是否适合您。

如果您觉得它没有用，请移至下一个有效的解决方法。

2]修复^(Repair)Microsoft .NET Framework^{(Microsoft .NET Framework)}

有时，由于.NET Framework 客户端配置文件^{(.NET Framework Client Profile)}损坏，也可能导致Windows 更新^{(Windows Update)}错误。但是，您可以使用控制面板中的^{(Control Panel)}程序^(Programs)小程序修复此配置文件。

为此，请遵循以下准则：

1. 打开控制面板^{(Open the Control Panel)}
2. 在程序^(Programs)和功能^(Features)页面上，搜索Microsoft .NET Framework。
3. 找到后，右键单击它并从菜单列表中选择修复^(Repair)或更改选项。^(Change)
4. 如果屏幕上出现UAC提示，请单击是^(Yes)按钮并开始该过程。

稍等片刻^(Wait)，完成该过程后，重新启动计算机，然后检查错误代码 643^{(Code 643)}现在是否已解决。

阅读^(Read)：安装 .NET Framework 时出现错误 0x800F081F。

3]使用^(Use)Microsoft .NET Framework 清理实用^{(Microsoft .NET Framework Cleanup Utility)}程序

作为最后的手段，您可以重新安装.NET Framework。实际上，这个问题也可能是由于Microsoft .NET Framework安装不当造成的。因此，彻底清理Microsoft .NET Framework，然后重新安装。

使用Microsoft .NET Framework 清理实用程序^{(Microsoft .NET Framework Cleanup Utility)}。

下载它，然后导航到下载位置并使用上下文菜单解压缩 zip 文件。

在提取的文件夹中，双击 cleanup_tool 可执行文件。如果UAC提示，只需点击Yes。

此时，您将被要求运行.NET Framework Setup Cleanup Utility，单击Yes按钮。

在下一个弹出菜单中，使用下拉菜单选择.NET Framework – All Versions (Windows 10) 。

然后点击立即清理^{(Cleanup Now)}按钮。它将从您的设备中彻底​​删除与Microsoft .NET Framework相关的组件。^{(Microsoft .NET Framework)}

现在继续下载最新版本的 .NET Framework，然后重新安装。

正确安装后，重新启动系统，然后尝试执行Windows 更新^{(Windows Update)}。

提示^(TIP)：Microsoft .NET Framework 修复工具^{(Microsoft .NET Framework Repair Tool)}可以修复 .NET  Framework问题和问题。

祝一切顺利！希望^(Hope)这篇文章对您有所帮助。

更多提示^{(MORE TIPS)}：解决 .NET Framework 安装问题。

How to fix Windows Update Error Code 643 - .NET Framework

It’s always suggested to update your Windows 10 OS regularly so that you cаn keep operating your computer in a smooth and impeccable way. But some uѕers have reported enсountering аn update error code 643 while trying to install Windows Update. Specifically, when you try to instаll an update for the .NET Framework, you may receive Windows Update error code 0x643  or 0x80070643. This error code is usually caused by a corruption in the .NET Framework installation or by an inconsistency in the MSI database state.

This update error code prevents you from updating your Windows update and may ultimately make it unusable. Thee error message can also appear in the following format:

Error(s) found: Code 643 Windows Update encountered an unknown error.

In this guide, we have come with some easy tweaks that may likely help you to fix this error. So let’s get started.

Windows Update Error Code 643

To fix Windows Update Error Code 643, follow these suggestions:

1. Run the Windows Update Troubleshooter
2. Repair the Microsoft .NET Framework
3. Use the Microsoft .NET Framework Cleanup Utility.

Before you begin, create a system restore point first. It will help you to revert the changes if somewhere undesirable appears to happen.

Let us now see how to fix the Error Code 643 in detail.

1] Run the Windows Update Troubleshooter

Windows 10 comes with an inbuilt troubleshooter tool that potentially diagnoses and fixes the common issues related to the Windows update.

In order to fix this error code, you can either run the Windows Update Troubleshooter or use Microsoft’s online troubleshooter method. And then check whether this method works for you.

If you don’t find it useful, move down to the next effective workaround.

2] Repair the Microsoft .NET Framework

Sometimes Windows Update error can also be caused due to the corrupted .NET Framework Client Profile. However, you can repair this profile using the Programs applet in Control Panel.

To do that, follow the below guidelines:

1. Open the Control Panel
2. On the Programs and Features page, search for Microsoft .NET Framework.
3. Once you find, right-click on it and select the Repair or Change option from the menu list.
4. If UAC prompts on the screen, click on the Yes button and let begin the procedure.

Wait for a while and once it completes the process, reboot your computer, and check whether the error Code 643 is resolved now.

Read: Error 0x800F081F while installing .NET Framework.

3] Use the Microsoft .NET Framework Cleanup Utility

As a last resort, you can reinstall the .NET Framework. Actually, this problem can also occur due to the improper installation of the Microsoft .NET Framework installation. Therefore, clean up Microsoft .NET Framework thoroughly and then reinstall it.

Use the Microsoft .NET Framework Cleanup Utility.

Download it and then navigate to the downloaded location and extract the zip file using the context menu.

Inside the extracted folder, double click on the cleanup_tool executable file. If UAC prompts, simply hit Yes.

At this time, you will be asked to run the .NET Framework Setup Cleanup Utility, click the Yes button.

In the next pop-up menu, select .NET Framework – All Versions (Windows 10) using the drop-down menu.

And then hit the Cleanup Now button. It will thoroughly remove the components related to the Microsoft .NET Framework from your device.

Now moving ahead download the latest version of the .NET Framework and then reinstall it.

After the proper installation, restart your system and then try to perform the Windows Update.

TIP: Microsoft .NET Framework Repair Tool can fix .NET  Framework problems & issues.

All the best! Hope you may find this article helpful.

MORE TIPS: Troubleshoot .NET Framework installation issues.

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