Firmware upgrade encountered an issue1/17/2024 ![]() ![]() Safe OS phase: A recovery partition is configured, Windows files are expanded, and updates are installed. Windows files are copied and installation components are gathered. Percent progress is displayed and will advance as you move through each phase, reaching 100% at the end of the second boot phase.ĭownlevel phase: The downlevel phase is run within the previous operating system. After the first reboot, the user interface will remain the same until the upgrade is completed. A reboot occurs between each of the phases. ![]() When performing an operating system upgrade, Windows Setup uses phases described below. Windows Setup starts and restarts the computer, gathers information, copies files, and creates or adjusts configuration settings. The Windows Setup application is used to upgrade a computer to Windows 10, or to perform a clean installation. You can also Submit Windows 10 upgrade errors using Feedback Hub so that Microsoft can diagnose your issue. If the general troubleshooting techniques described above or the quick fixes detailed below don't resolve your issue, you can attempt to analyze log files and interpret upgrade error codes. Obtain and install updated device drivers, temporarily uninstall anti-virus software, then retry the upgrade. Disconnect all peripheral devices except for the mouse, keyboard, and display. Boot failures are most commonly due to anti-virus software or filter drivers. Second boot phase: In this phase, the system is running under the target OS with new drivers. Obtain and install updated device drivers, then retry the upgrade. Update or temporarily remove the disk encryption.įirst boot phase: Boot failures in this phase are relatively rare, and almost exclusively caused by device drivers. If the computer successfully boots into Windows PE, but you are not able to browse the system drive on the computer, it's possible that non-Microsoft disk encryption software is blocking your ability to perform a Windows 10 upgrade. If you're still unable to boot to installation media after applying updates, disconnect or replace legacy hardware. Check with your hardware manufacturer and apply any recommended BIOS and firmware updates. If the computer doesn't successfully boot into Windows PE using the media that you created, this is likely due to a hardware or firmware issue. This method can only be used to perform a clean install, which won't migrate any of your apps and settings, and you'll be required reenter your Windows 10 license information. For more information, see Change a GUID Partition Table Disk into a Master Boot Record Disk.ĭon't proceed with the Windows 10 installation after booting from this media. You can use the DISKPART command to convert the USB drive from GPT to MBR. The tool requires that you use MBR partition style. If you attempt to use the media creation tool with a USB drive and this fails with error 0x80004005 - 0xa001a, this is because the USB drive is using GPT partition style. You can use the media creation tool to create bootable media, or you can use tools such as the Windows ADK, and then boot your device from this media to test for hardware and firmware compatibility issues. Since the computer is booted into Windows PE during the SafeOS phase, a useful troubleshooting technique is to boot into Windows PE using installation media. SafeOS phase: Errors most commonly occur during this phase due to hardware issues, firmware issues, or non-microsoft disk encryption software. Also ensure the Windows setup source and the destination drive are accessible. ![]() If you do encounter an error, ensure the source OS is stable. First, let's summarize the actions performed during each phase because this affects the type of errors that can be encountered.ĭownlevel phase: Because this phase runs on the source OS, upgrade errors aren't typically seen. These phases are explained in greater detail below. This key is volatile and only present during the upgrade process it contains a binary value in the range 0-100. Note: Progress is tracked in the registry during the upgrade process using the following key: HKLM\System\Setup\mosetup\volatile\SetupProgress. The computer will reboot once between each phase. SetupDiag automates log file analysis, detecting and reporting details on many different types of known upgrade issues.Īpplies to: Windows 10 Actions performed during upgrade processesīriefly, the upgrade process consists of four phases that are controlled by Windows Setup: Downlevel, SafeOS, First boot, and Second boot. Use the SetupDiag tool before you begin manually troubleshooting an upgrade error. ![]()
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