Windows 10 Upgrade reboot loop or error 0xC1900101- 0x20017

Recently I spent time troubleshooting a device unable to upgrade from the November Update (1511) of Windows 10 to the latest Anniversary Update (1607).

Setup would progress until the near end, after which it would reboot and remain stuck in a reboot loop. It’s difficult to troubleshoot these situations, first thing to do is:

  1. Boot from alternate media, I used an USB stick with Windows 10 Anniversary Update media on it
  2. Hit “Install Now” and then choose “Repair your computer” on the bottom left corner
  3. Choose “Troubleshoot” and “Go build to the previous build”

Windows will roll-back and within minutes you should be able to logon the older operating system.
Next grab the setupact.log and setuperr.log located underneath the C:\Windows\Panther directory.

The thing that moved us into the right direction were the following log entries:

2016-10-24 11:08:47, Info                  [msoobe.exe] Added IOOBEGlobalSettingsCacheListener RecommendedSettings Plugin
2016-10-24 11:08:47, Info                  [msoobe.exe] Loading OOBE plugin Region Plugin
2016-10-24 11:08:47, Error                [msoobe.exe] Failed to Initialize plugin [Region Plugin] [hr=0x80070057]
2016-10-24 11:08:47, Error                [msoobe.exe] Failed create OOBE plugin from key Region Plugin [hr=0x80070057]
2016-10-24 11:08:47, Error                [msoobe.exe] Failed to load OOBE plugins with hr=0x80070057
2016-10-24 11:08:47, Info                  [msoobe.exe] Wrote End-of-OOBE Timestamp to Registry
2016-10-24 11:08:47, Info                  [msoobe.exe] License for msoobe-FirstLogonAnim-MayBeDisabled is false
2016-10-24 11:08:47, Error                [msoobe.exe] Failed to run OOBE Host with hr=0x800700572016-10-24 11:08:47,

The device would go through all upgrade phases and fail during the Microsoft Out Of Box Experience (msoobe) after loading the Region Plugin.
Further troubleshooting can be difficult. We ended up connecting the device to a network and use a remote Windows Debugger to step through msoobe initializing. This is where we realized that a local of “en-150” was used where we typically see “en-US” or different locale. “en-150” relates to a locale “English (Europe)”, a new option introduced in the first release of Windows 10 (1507). Further debugging revealed that the Out Of Box Experience would crash due to a missing value with E_INVALIDARG [0x80070057].


The workaround is to not use the “English (Europe)” locale, technically it could also be a different locale. In our case the “English (Europe) was used. Use the following steps to change this for all accounts:

  • Go to Regional Settings
  • Change the Format to English (United States) – or anything other than “English (Europe)” or the one you are currently using.
    • You can also select a different language or change any of the date/time formats per your needs
  • Select the Administrative tab and hit Copy Settings
  • Select the bottom two checkboxes and hit OK.
  • Reboot the PC and start the Windows Anniversary Update. Windows should upgrade.

We need to get this fixed, in the meantime the workaround hopefully helps you upgrade.
In case this post helped you – consider leaving a reply.


Comments (2)

  1. peripete says:

    Great article, really appreciate the in depth explanation of the issue!
    This resolved an issue I had for months, preventing me from upgrading our organization workstations and laptops from getting the latest build.
    The addition of this region was great for a business like ours, being an English spoken business but based in various non English speaking European countries, the ability to decentralize our laptops to a specific region/language is great. (used to have to use the Ireland fix!)
    Customization of format preferences in an image such as “first day of the week” to show in English instead of dutch/french/Italian used to be a messy affair, not to mention software whose multi language installers use the Region format to determine its language.

    Really hoping for a hotfix on this one!

  2. 2wicked says:

    This solved this issue for me. It first appeared when I manually installed the Anniversary Update shortly after it was released. Luckily I managed to revert back to my previous installation. Recently however, the update was installed as a regular scheduled update and the same thing happened again. I could again revert back to my previous installation, only to find out the 1607 update was ready to be installed again after the next reboot. I was about the re-install Windows when I heard about this solution to this very annoying problem. Thanks.

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