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Gary Moore
2021-08-21 13:08:01 -07:00
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windows/deployment/upgrade/troubleshoot-upgrade-errors.md
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@ -59,31 +59,31 @@ When performing an operating system upgrade, Windows Setup uses phases described
1. **Downlevel phase**: The downlevel phase is run within the previous operating system. Windows files are copied and installation components are gathered.
![downlevel phase](../images/downlevel.png)
![downlevel phase.](../images/downlevel.png)
2. **Safe OS phase**: A recovery partition is configured, Windows files are expanded, and updates are installed. An OS rollback is prepared if needed. Example error codes: 0x2000C, 0x20017.
![safeOS phase](../images/safeos.png)
![safeOS phase.](../images/safeos.png)
3. **First boot phase**: Initial settings are applied. Example error codes: 0x30018, 0x3000D.
![first boot phase](../images/firstboot.png)
![first boot phase.](../images/firstboot.png)
4. **Second boot phase**: Final settings are applied. This is also called the **OOBE boot phase**. Example error codes: 0x4000D, 0x40017.
At the end of the second boot phase, the **Welcome to Windows 10** screen is displayed, preferences are configured, and the Windows 10 sign-in prompt is displayed.
![second boot phase](../images/secondboot.png)
![second boot phase.](../images/secondboot.png)
![second boot phase](../images/secondboot2.png)
![second boot phase.](../images/secondboot2.png)
![second boot phase](../images/secondboot3.png)
![second boot phase.](../images/secondboot3.png)
5. **Uninstall phase**: This phase occurs if upgrade is unsuccessful (image not shown). Example error codes: 0x50000, 0x50015.
**Figure 1**: Phases of a successful Windows 10 upgrade (uninstall is not shown):
![Upgrade process](../images/upgrade-process.png)
![Upgrade process.](../images/upgrade-process.png)
DU = Driver/device updates.<br>
OOBE = Out of box experience.<br>