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Are you using any VPN software? I found that Netmotion causes the upgrade to fail.<br />
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What kind of security apps are you using?
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A) Try to uninstall (NOT DISABLE) any antivirus programs that you may have.make clean boot<br />
B) Disable any software that is running in the background via Task Manager.
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recommended steps :<br />
run updateassistant : &nbsp; <a href="https://support.microsoft.com/en-gb/help/3159635/windows-10-update-assistant" rel="ugc">https://support.microsoft.com/en-gb/help/3159635/windows-10-update-assistant</a><br />
&nbsp;update first the bios and drivers<br />
run sfc before updating, or a repair, to be sure the OS is ok<br />
<br />
i have the same problem on an Asus Desktop...
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Most likely a common piece of software. &nbsp;Disconnect any non necessary USB devices during upgrade also. &nbsp; Are you using the most current version of the Media creation tool or USB media created from the most recent version? &nbsp;Download that again and start from the beginning.
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oh yes - and try setting the bios to UEFI - and legacy
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Registry edit for listed Windows 10 upgrade error

Windows-10-Upgrade-Error-0xC1900101-.pdf

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Wow, that seems pretty drastic, but if it works, it works, right?<br />
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Glad you got it resolved.
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We are trying to upgrade 8 computers from Windows 7 to Windows 10 and they keep failing. We have followed all suggestions in MS document at <a href="https://docs.microsoft.com/en-us/windows/deployment/upgrade/resolution-procedures" rel="ugc">https://docs.microsoft.com/en-us/windows/deployment/upgrade/resolution-procedures</a>&nbsp;regarding the message 0xC1900101 - 0x4000D that we are receiving in EVERY case. These are different computer manufacturers, different processors, different drivers, etc. and we can't isolate a single common factor that may cause this. Any help is more that appreciated?
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We are trying to upgrade 8 computers from Windows 7 to Windows 10 and they keep failing. We have followed all suggestions in MS document at https://docs.microsoft.com/en-us/windows/deployment/upgrade/resolution-procedures regarding the message 0xC1900101 - 0x4000D that we are receiving in EVERY case. These are different computer manufacturers, different processors, different drivers, etc. and we can't isolate a single common factor that may cause this. Any help is more that appreciated?

Windows 10 Upgrade Failures

Windows 10 is a personal computer operating system featuring the "universal application architecture" (UAP); apps can be designed to run across multiple devices with nearly identical code, including PCs, tablets, smartphones, embedded systems, Xbox One, Surface Hub and HoloLens. Windows 10 also includes a virtual desktop system, a window and desktop management feature called Task View, the Microsoft Edge web browser, support for fingerprint and face recognition login, voice-based search (Cortana), new security features for enterprise environments, and DirectX 12 and WDDM 2.0 to improve the operating system's graphics capabilities for games.

Windows 10

This topic area includes legacy versions of Windows prior to Windows 2000: Windows 3/3.1, Windows 95 and Windows 98, plus any other Windows-related versions including Windows Mobile.

Windows OS

Windows 7 is an operating system from Microsoft. Features include multi-touch support, a redesigned Windows Shell with a new taskbar, referred to as the Superbar, a home networking system called HomeGroup, and performance improvements.