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Greg Lindsay
2020-06-08 09:25:56 -07:00
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6
windows/deployment/upgrade/resolution-procedures.md
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@ -38,6 +38,12 @@ To resolve a rollback that was caused by driver conflicts, try running setup usi
See the following general troubleshooting procedures associated with a result code of 0xC1900101:<br /><br />
| Code | Mitigation | Cause |
| :--- | :--- | :--- |
| 0xC1900101 - 0x20004 | Uninstall antivirus applications.<br>Remove all unused SATA devices. <br>Remove all unused devices and drivers. <br>Update drivers and BIOS. | Windows Setup encountered an error during the SAFE_OS with the INSTALL_RECOVERY_ENVIRONMENT operation. <br>This is generally caused by out-of-date drivers. |
| 0xC1900101 - 0x2000c | Disconnect all peripheral devices that are connected to the system, except for the mouse, keyboard and display.<br> Contact your hardware vendor to obtain updated device drivers.<br> Ensure that "Download and install updates (recommended)" is accepted at the start of the upgrade process. | Windows Setup encountered an unspecified error during Wim apply in the WinPE phase.<br> This is generally caused by out-of-date drivers |
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2
windows/deployment/upgrade/troubleshoot-upgrade-errors.md
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@ -26,7 +26,7 @@ ms.topic: article
If a Windows 10 upgrade is not successful, it can be very helpful to understand *when* an error occurred in the upgrade process.
Briefly, the upgrade process consists of four phases: **Downlevel**, **SafeOS**, **First boot**, and **Second boot**. The computer will reboot once between each phase. Note: Progress is tracked in the registry during the upgrade process using the following key: **HKLM\System\Setup\mosetup\volatile\SetupProgress**. This key is volatile and only present during the upgrade process; it contains a binary value in the range 0-100.
Briefly, the upgrade process consists of four phases that are controlled by [Windows Setup](https://docs.microsoft.com/windows-hardware/manufacture/desktop/windows-setup-technical-reference): **Downlevel**, **SafeOS**, **First boot**, and **Second boot**. The computer will reboot once between each phase. Note: Progress is tracked in the registry during the upgrade process using the following key: **HKLM\System\Setup\mosetup\volatile\SetupProgress**. This key is volatile and only present during the upgrade process; it contains a binary value in the range 0-100.
These phases are explained in greater detail [below](#the-windows-10-upgrade-process). First, let's summarize the actions performed during each phase because this affects the type of errors that can be encountered.