如果您在Windows 10中^{(Windows 10)}使用自定义默认用户配置文件^{(using a custom default user profile)}时发现性能不佳，那么这篇文章旨在帮助您。在这篇文章中，我们将确定导致性能问题的用户配置文件事件 ID 454^{(user profile event ID 454)}错误的潜在原因，并提供适当的解决方案，您可以尝试帮助您修复错误。

让我们看一下可能遇到此错误的典型场景。^{(typical scenario)}

您创建一个新的默认用户配置文件并启用它。新用户使用从基于Windows 10、Windows Server 2016或 Windows Server 2019 的计算机上的默认配置文件创建的配置文件登录。

在这种情况下，您会遇到以下一个或多个问题：

• 桌面图标需要很长时间才会出现。
• 在 Internet Explorer或Microsoft Edge中启动或浏览时性能很差 。
• ESENT（一种可嵌入的事务性数据库引擎。它首先与Microsoft Windows 2000一起提供，从那时起就可供开发人员使用）事件日志^{(Event Log)}中记录了如下错误：

EventLogID: 454

TaskHostW: (pid)

WebCacheLocal: “Database recovery/restore failed with unexpected error -1907”

完整的事件日志消息^{(full event log message)}还可能指示与不同用户文件夹位置的关联，例如C:\Users\Administrator。

事件 ID 454^{(Event ID 454)}错误– 用户^{(– User)}配置文件性能问题

如果您遇到此事件 ID 为 454 的用户配置文件性能问题^{(user profile performance issues with event ID 454)}，您可以尝试以下推荐的两步解决方案^{(recommended two-step solution)}来解决错误。

在开始之前，您需要取消隐藏隐藏文件。

要查看隐藏文件，请按照下列步骤操作：

• 按 Windows 键 + E打开文件资源管理器^{(open File Explorer)}。
• 在文件资源管理器中，选择文件^(File)，然后选择 选项^(Options)。
• 在 查看 ^(View )选项卡上，选择 显示隐藏的文件、文件夹和驱动器 ^{(Show hidden files, folders, and drives )}选项。
• 取消选择 隐藏受保护的操作系统文件（推荐） ^{(Hide protected operating system files (Recommended) )}选项。
• 单击确定^{(OK )}（请记住在问题解决后重新选择这两个选项）。

现在您可以按如下方式继续解决方案：

1] 使用具有管理凭据的帐户登录到每台受影响的计算机^{(Log on to each affected computer)}，然后导航到并删除以下隐藏文件和文件夹（如果存在）：

提示^(Tip)：WebCacheLock.dat和WebCache分别是您需要删除的文件和文件夹。

C:\Users\Default\AppData\Local\Microsoft\Windows\WebCacheLock.dat

C:\Users\Default\AppData\Local\Microsoft\Windows\WebCache

2] F或计算机上的每个用户帐户^{(or each user account on the computer)}，确保用户已完全注销并且配置文件已完全卸载，然后导航到并删除以下隐藏文件和文件夹（如果存在）：

C:\Users\<affectedUserFolder>\AppData\Local\Microsoft\Windows\WebCacheLock.dat

C:\Users\<affectedUserFolder>\AppData\Local\Microsoft\Windows\WebCache

将<affectedUserFolder>占位符替换为实际的用户配置文件文件夹名称。重复此操作以删除计算机上每个受影响的用户帐户的上述文件和文件夹。

根据Microsoft的说法，您可能会遇到事件 ID 454 的用户配置文件性能问题，^{(user profile performance issues with event ID 454)} 因为默认用户配置文件包含另一个用户缓存数据库的锁定副本。

当新用户登录到计算机时，默认用户配置文件内容将合并到他们的新配置文件中。随着Windows shell 和桌面开始加载，数据库无法完全初始化以供使用。使用数据库的应用程序可能会遇到负面性能或报告错误。

Fix Event ID 454 error - User profile performance issues in Windows 10

If you notice poor perfоrmance issues when using a custom default user profile in Windows 10, then this post is intended to help you. In this post, we will identify the potential cause(s) to the user profile event ID 454 error which leads to performance issues, as well as provide the appropriate solution that you can try to help you fix the error.

Let’s take a look at a typical scenario where you can encounter this error.

You create a new default user profile and enable it. A new user logs on by using a profile that is created from the default profile on a Windows 10, Windows Server 2016, or Windows Server 2019-based computer.

In this scenario, you encounter one or more of the following issues:

• Desktop icons take a long time to appear.
• Performance is poor when you start or browse in Internet Explorer or Microsoft Edge.
• ESENT (an embeddable, transactional database engine. It first shipped with Microsoft Windows 2000 and has been available for developers to use since then) errors like the following are recorded in the Event Log:

EventLogID: 454

TaskHostW: (pid)

WebCacheLocal: “Database recovery/restore failed with unexpected error -1907”

The full event log message may also indicate an association with a different user folder location, such as C:\Users\Administrator.

Event ID 454 error – User profile performance issues

If you’re faced with this user profile performance issues with event ID 454, you can try the recommended two-step solution described below to resolve the error.

Before you begin, you need to unhide hidden files.

To view hidden files, follow these steps:

• Press Windows key + E to open File Explorer.
• In File Explorer, select File, and then select Options.
• On the View tab, select the Show hidden files, folders, and drives option.
• Unselect the Hide protected operating system files (Recommended) option.
• Click OK (Remember to re-select this two options after the issue is fixed).

Now you can proceed with the solution as follows:

1] Log on to each affected computer by using an account that has administrative credentials, and then navigate to and then delete the following hidden file and folder if they exist:

Tip: WebCacheLock.dat and WebCache is the file and folder you are required to delete, respectively.

C:\Users\Default\AppData\Local\Microsoft\Windows\WebCacheLock.dat

C:\Users\Default\AppData\Local\Microsoft\Windows\WebCache

2] For each user account on the computer, make sure that the user is logged off completely and the profile has unloaded fully, and then navigate to and delete the following hidden file and folder if they exist:

C:\Users\<affectedUserFolder>\AppData\Local\Microsoft\Windows\WebCacheLock.dat

C:\Users\<affectedUserFolder>\AppData\Local\Microsoft\Windows\WebCache

Replace the <affectedUserFolder> placeholder with the actual user profile folder name. Repeat this to remove the above files and folders for each affected user account on the computer.

According to Microsoft, you might experience the user profile performance issues with event ID 454 because the default user profile includes a locked copy of another user’s cache database.

When the new user logs on to the computer, the default user profile content is incorporated into their new profile. As the Windows shell and desktop begin to load, the database can’t be fully initialized for use. Applications that use the database likely experience negative performance or report errors.

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