如果在您的 Windows 10 计算机上下载或安装 Windows 更新时遇到问题^{(issues downloading or installing Windows Updates)}，并且您运行Windows 更新疑难解答或 WU 在线疑难解答^{(the WU online troubleshooter)}来解决问题 - 但疑难解答本身不会解决问题，而是会抛出一条消息潜在的 Windows 更新数据库检测到错误，修复^{(Potential Windows Update Database error detected, Repair )}Windows 更新数据库损坏^{(Windows Update Database Corruption)}！遇到这种情况怎么办！？以下是您可能想要查看的一些故障排除想法。

检测到潜在的Windows 更新数据库^{(Windows Update Database)}错误， 修复 Windows 更新数据库损坏^{(Repair Windows Update Database Corruption)}

1]运行系统文件检查器

要运行系统文件检查器，您需要以管理员权限打开命令提示符^{(open Command Prompt with administrator privilege)}。为此，请在任务栏搜索框中搜索^(Taskbar)cmd，右键单击命令提示符^{(Command Prompt)}并选择以管理员身份运行。^(Run)现在您需要输入此命令并按Enter：

sfc /scannow

此扫描将替换所有损坏或损坏的 Windows 操作文件。扫描结束后，重新启动计算机。

相关^(Related)：Windows Update 安装失败或无法下载^{(Windows Update fails to install or will not download)}。

2]运行DISM

Dism.exe工具^{(Dism.exe tool)}可用于不同的情况，其中之一是修复损坏的 Windows 更新文件。请注意，如果要修复损坏的Windows Update 系统文件^{(Windows Update System Files)}，则需要运行不同的命令。如果您运行通常的 /RestoreHealth 命令，则不一定有帮助。DISM将用好的文件替换可能损坏或丢失的系统文件。但是，如果您的Windows 更新客户端已经损坏^{(Windows Update client is already broken)}，系统将提示您使用正在运行的Windows安装作为修复源，或使用网络共享中的Windows并行文件夹作为文件源。

然后，您将需要运行以下命令：

DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:C:\RepairSource\Windows /LimitAccess

在这里，您必须将C:\RepairSource\Windows占位符替换为修复源的位置。

该过程完成后，DISM将在^(DISM)%windir%/Logs/CBS/CBS.log中创建一个日志文件，并捕获该工具发现或修复的任何问题。

3]将Windows 更新^{(Reset Windows Update)}组件、设置等重置为默认值

如果您需要将Windows 更新^{(Windows Update)}恢复为默认值，以下链接将为您提供帮助：

1. 手动重置 Windows 更新设置或组件^{(Manually reset Windows Update settings or components)}
2. 重置 Windows 更新代理^{(Reset Windows Update Agent)}
3. 使用 PowerShell 脚本重置 Windows 更新客户端^{(Reset Windows Update Client using PowerShell Script)}
4. 重置 SoftwareDistribution 文件夹^{(Reset SoftwareDistribution folder)}
5. 重置 Catroot2 文件夹^{(Reset Catroot2 folder)}。

现在我知道这看起来需要做很多工作，但是看看什么可能适用于您的情况并首先尝试该建议。

All the best!

Potential Windows Update Database error detected in Windows 10

If аre fаcing issues downloading or installing Windows Updates on your Windows 10 computer, and you run the Windows Update Troubleshooter or the WU online troubleshooter to fix the issue – but instead of resolving the problem, the troubleshooter itself throws up a message Potential Windows Update Database error detected, Repair Windows Update Database Corruption! What do you do in such a case!? Here are some troubleshooting ideas that you might want to take a look at.

Potential Windows Update Database error detected, Repair Windows Update Database Corruption

1] Run System File Checker

To run System File Checker, you need to open Command Prompt with administrator privilege. To do this, search for cmd in Taskbar search box, right-click on Command Prompt and select Run as administrator. Now you need to enter this command and hit Enter:

sfc /scannow

This scan will replace all corrupted or damaged Windows operating files. Once the scan is over, restart your computer.

Related: Windows Update fails to install or will not download.

2] Run DISM

The Dism.exe tool can be used in different situations, and one of them is to repair a corrupted Windows Update files.  Do note that you need to run a different command if you want to repair corrupted Windows Update System Files.  If you run the usual /RestoreHealth command, if may not necessarily help. DISM will replace potentially corrupted or missing system files with good ones. However, if your Windows Update client is already broken, you will be prompted to use a running Windows installation as the repair source or use a Windows side-by-side folder from a network share, as the source of the files.

You will then be required to run the following command instead:

DISM.exe /Online /Cleanup-Image /RestoreHealth /Source:C:\RepairSource\Windows /LimitAccess

Here you have to replace the C:\RepairSource\Windows placeholder with the location of your repair source.

Once the process is complete, DISM will create a log file in %windir%/Logs/CBS/CBS.log and capture any issues that the tool finds or fixes.

3] Reset Windows Update components, settings, etc, to defaults

The following links will help you if you need to restore Windows Update to default:

1. Manually reset Windows Update settings or components
2. Reset Windows Update Agent
3. Reset Windows Update Client using PowerShell Script
4. Reset SoftwareDistribution folder
5. Reset Catroot2 folder.

Now I know that this looks like a lot of work, but see what may apply to your case and try that suggestion first.

All the best!

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