如果您尝试从旧版本的 Windows 10 执行系统升级到新版本的 Windows 10^{(upgrade from an older version of Windows 10 to a newer version of Windows 10)}并且该过程失败并出现错误0xC1900101 – 0x40017，那么这篇文章旨在帮助您。在这篇文章中，我们将确定可能的原因，然后提供相应的解决方法以及您可以尝试解决问题的解决方案。

Error 0xC1900101 – 0x40017, The installation failed in the SECOND_BOOT phase with an error during BOOT operation.

错误 0xC1900101 – 0x40017，在SECOND_BOOT阶段安装失败

由于计算机安装了Citrix Virtual Delivery Agent (VDA) ，因此^{(Citrix Virtual Delivery Agent (VDA))}在第二次系统重新启动后^{(after the second system restart)}出现此 Windows 10 升级错误。Citrix VDA安装设备驱动程序和文件系统过滤器驱动程序 ( CtxMcsWbc )。此Citrix筛选器驱动程序可防止升级将更改写入磁盘。这会触发系统回滚。

如果您遇到此问题，您可以尝试下面描述的我们推荐的解决方案或解决方法（根据您的要求）来缓解问题。

要解决^{(To resolve)}此问题，请执行以下操作：

• 卸载Citrix VDA ( VDAWorkstationSetup_7.11 )。
• 再次运行 Windows 升级。
• 重新安装 Citrix VDA。

要解决^{(work around)}此问题，请执行以下操作：

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：

• 按Windows key + R调用“运行”对话框。
• 在“运行”对话框中，键入regedit并按 Enter 以打开注册表编辑器^{(open Registry Editor)}。
• 导航或跳转到下面的注册表项路径：

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CtxMcsWbc

• 在该位置，通过将 Start 值从0更改为4来禁用Citrix MCS 缓存服务^{(Citrix MCS cache service)}。

接下来，仍然在注册表编辑器^{(Registry Editor)}中，导航或跳转到下面的注册表项路径：

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e967-e325-11ce-bfc1-08002be10318}

• 在该位置，删除UpperFilters值中的CtxMcsWbc条目。
• 退出注册表编辑器。
• 重新启动计算机，然后再次尝试升级。

就是这样！完成解决方法或解决方案本身后，应解决第二次系统重启后的Windows 10 升级错误 0xC1900101 – 0x40017 。^{(Windows 10 upgrade error 0xC1900101 – 0x40017)}

额外读数^{(Additional reading)}：修复0xC1900101误差如0xc1900101-0x20004，0xc1900101-0x2000c，0xc1900101-0x20017，0xc1900101-0x30018,0xc1900101-0x3000d，0xc1900101-0x4000d或0xc1900101-0x40017。

思杰 VDA

Citrix VDA (Virtual Delivery Agent ) 是Xenapp/Xendesktop套件附带的软件，需要安装在应用程序或完整桌面的客户端设备（VM 或物理^(Physical)、桌面操作系统^{(Desktop OS)}或服务器操作系统^{(Server OS)}、Windows或Linux ）上发布给用户进行远程访问。

例如; 如果要向用户发布Windows 10 VM，则需要在 VM 中安装Citrix XD VDA。

VDA负责响应来自Citrix Delivery Controller的请求，并与 VM 硬件和软件的每个组件通信。一旦VDA在^(VDA)DDC中注册，它就会开始为用户请求提供服务。

Error 0xC1900101-0x40017, Installation failed in SECOND_BOOT phase

If when you attempt to perform a sуstem upgrade from an older version of Windows 10 to a newer version of Windows 10 and the process fails with the error 0xC1900101 – 0x40017, then this post is intended to help you. In this post, we will identify the possible cause and then offer the corresponding workaround as well as the solution you can try to remediate the issue.

Error 0xC1900101 – 0x40017, The installation failed in the SECOND_BOOT phase with an error during BOOT operation.

Error 0xC1900101 – 0x40017, The installation failed in the SECOND_BOOT phase

This Windows 10 upgrade error after the second system restart occurs because the computer has Citrix Virtual Delivery Agent (VDA) installed. Citrix VDA installs device drivers and a file system filter driver (CtxMcsWbc). This Citrix filter driver prevents the upgrade from writing changes to the disk. This triggers the system rollback.

If you’re faced with this issue, you can try our recommended solution or workaround (per your requirement) described below to mitigate the issue.

To resolve this, do the following:

• Uninstall Citrix VDA (VDAWorkstationSetup_7.11).
• Run the Windows upgrade again.
• Reinstall Citrix VDA.

To work around this problem, do the following:

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:

• Press Windows key + R to invoke the Run dialog.
• In the Run dialog box, type regedit and hit Enter to open Registry Editor.
• Navigate or jump to the registry key path below:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\CtxMcsWbc

• At the location, disable the Citrix MCS cache service by changing the Start value from 0 to 4.

Next, still in the Registry Editor, navigate or jump to the registry key path below:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Class\{4d36e967-e325-11ce-bfc1-08002be10318}

• At the location, delete the CtxMcsWbc entry in the UpperFilters value.
• Exit Registry Editor.
• Restart the computer, and then try the upgrade again.

That’s it! After completing the workaround or the solution itself the Windows 10 upgrade error 0xC1900101 – 0x40017 after the second system restart should be resolved.

Additional reading: Fix 0xC1900101 errors like 0xC1900101-0x20004, 0xC1900101-0x2000c, 0xC1900101-0x20017, 0xC1900101-0x30018, 0xC1900101-0x3000D, 0xC1900101-0x4000D or 0xC1900101-0x40017.

Citrix VDA

Citrix VDA (Virtual Delivery Agent) is a piece of software accompanied with Xenapp/Xendesktop suite, which requires to be installed on client devices (VM or Physical, Desktop OS or Server OS, Windows or Linux) whose application or complete desktop is to be published to a user for remote access.

For example; If you want to publish a Windows 10 VM to a user, you need to install a Citrix XD VDA in the VM.

VDA is responsible for responding requests from Citrix Delivery Controller and it speaks to every component of the VM hardware and software. As soon as the VDA is registered into DDC it starts catering the services to a user request.

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