Windows 10 Update 2004 / 20H2 - Error 0xc1900101

Anonymous
2020-07-21T19:15:15+00:00

Windows specifications

Edition Windows 10 Education
Version 1909
Installed on 2019-06-25
OS build 18363.959
Arch. Type x86_64
Insider program No

Device specifications

Processor AMD Ryzen 5 1600X 6c/12t 3.6GHz
BIOS Mode UEFI
Motherboard Asrock AB350 Pro4
RAM 16 GB

Issue

I downloaded the Feature Update 2004 and tried to installed it 3 times. Each time all went good without error, then it ask for restart, so I click the "Restart and Update", then it reboot (1st time) but before accessing the authentication page it reboot again (2nd time) then again before accessing the authentication page it reboot again (3rd time) this time it's really longer (as if the update was finally applying), it goes to teh authentication page. I log in, then I check and the I'm still at update 1909.

In the Windows update history I can see an error code: 0xc1900101. Nowhere else I can see an error.

The two first times I tried to update and it fails when I went in Windows Update and clicked "Check for updates" I saw the 2004 update available and was able to download and install it again. But since last try it now tells me I'm up to date yet I'm still at update 1909 and 2004 failed to apply.

PS: I have Core Protection disabled.

PS2: Windows Update troubleshooter says all is fine.

Additional information

From systeminfo:

Hotfix(s):                 23 Hotfix(s) Installed.
                           [01]: KB4565633
                           [02]: KB4497165
                           [03]: KB4498523
                           [04]: KB4503308
                           [05]: KB4506933
                           [06]: KB4508433
                           [07]: KB4509096
                           [08]: KB4515383
                           [09]: KB4516115
                           [10]: KB4517245
                           [11]: KB4520390
                           [12]: KB4521863
                           [13]: KB4524569
                           [14]: KB4525419
                           [15]: KB4528759
                           [16]: KB4537759
                           [17]: KB4538674
                           [18]: KB4541338
                           [19]: KB4552152
                           [20]: KB4560959
                           [21]: KB4561600
                           [22]: KB4565554
                           [23]: KB4565483

Windows for home | Windows 10 | Windows update

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Answer accepted by question author
Anonymous
2021-04-17T12:05:03+00:00

If you experience this issue on ASRock motherboard make sure that you've updated to the latest available BIOS.

Then Enter the BIOS (F2) and Turn off (Compatibility Support Module) 

After you changed the BIOS setting run Windows10Upgrade9252.exe available for download on microsoft website url: http://go.microsoft.com/fwlink/?LinkID=799445

Problem solved.

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  1. Anonymous
    2020-07-23T16:28:02+00:00

    You might try uninstall it then..but I think the last option is to preform a clean install.

    I tried with Vanguard uninstalled, still the same. Nah a clean install is too extreme and not worth it.

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  2. Sumit 44,316 Reputation points Volunteer Moderator
    2020-07-23T16:19:55+00:00

    Thanks. Can you send the files from C:/Windows/Panther as well?

    Via 

    https://docs.microsoft.com/en-us/windows/deployment/upgrade/resolution-procedures

    0xC1900101 - 0x20017 Ensure that all that drivers are updated. <br><br>Open the Setuperr.log and Setupact.log files in the %windir%\Panther directory, and then locate the problem drivers. <br><br>For more information, see Windows Vista, Windows 7, Windows Server 2008 R2, Windows 8.1, and Windows 10 setup log file<br> locations. <br><br>Update or uninstall the problem drivers. A driver has caused an illegal operation. <br><br>Windows was not able to migrate the driver, resulting in a rollback of the operating system. <br><br>This is a SafeOS boot failure, typically caused by drivers or non-Microsoft disk encryption software.

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  3. Anonymous
    2020-07-23T16:07:09+00:00

    You might try uninstall it then..but I think the last option is to preform a clean install.

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  4. Anonymous
    2020-07-23T15:52:04+00:00

    I didn't have luck but know I know it's due to error 0xC1900101 - 0x20017, so it's a driver error.

    My best guess it's Vanguard that causes the problem. See https://www.techspot.com/news/84841-valorant-anti-cheat-software-loads-kernel-based-driver.html

    I disabled it to auto-start but maybe uninstalling it is necessary.

    Also it seems that Vanguard can block other drivers: https://www.ginx.tv/en/valorant/valorant-vanguard-hotfix-mouse-keyboard-input-device-driver

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