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0xC1900101 – 0x20017 Installation failed in SAFE_OS phase with an error during BOOT operation

If you try to upgrade your Windows 11/10 to the next version, and you see a message – Error 0xC1900101 – 0x20017, The installation failed in SAFE_OS phase with an error during BOOT operation, then this post will be able to help you.

0xC1900101 is a frequently observed code which occurs at t any stage of the upgrade process; It is also called as the generic rollback code which points out to the presence of an incompatible driver. Along with updating the drivers, it is suggested to run Windows Setup using a minimal set of drivers and startup programs by performing a clean boot before initiating the upgrade process.

Installation failed in SAFE_OS phase with an error during BOOT operation

The failure occurs during an update where OS is not able to migrate the driver as it causes illegal operation. It results in a rollback of the operating system. This is a SafeOS boot failure, typically caused by drivers or non-Microsoft disk encryption software. During the SAFEOS phase, the system verifies that everything, including drivers, is behaving as they are expected. Any operation which is not secure or signatures are missing will cause an issue when it comes to system stability. I have noticed that many a time when you force upgrade an incompatible system, it will result in BSOD. It is crucial that you find the driver causing the problem, and it is rather easy.

Go to %windir%\Panther directory, and then locate the Setuperr.log and Setupact.log files and open them. Among the two files, Setupact.log is specifically created when an upgrade fails. You will have to look for a reference for failure in the log file and find the driver responsible.

Fix Windows Setup error 0xC1900101 – 0x20017

There are only two ways to fix it, either update the driver to a compatible version or roll back the problematic driver. It may so happen that you made a recent update to drive, and then tried to upgrade. If that’s the case, then rolling back will help you to upgrade. If the upgrade has an issue with the existing driver, and you are forcing the update, you should check if the driver has a compatible version.

  1. Ensure that all the drivers are updated
  2. Uninstall the problematic drivers
  3. Upgrade in Clean Boot State.

You will need admin permission to perform any of these operations.

1) Ensure that all the drivers are updated

The first thing you should do is update the drivers with the version which is compatible with the version you are planning to upgrade. Most of the drivers offer backward compatibility, so that should be a problem unless mentioned otherwise. In case you have updated, make sure to roll back the driver to the previous version.

If you are not able to find the latest version of the driver, we suggest using tools like Double Driver, Driver Doctor, and more.

2) Uninstall the problematic drivers

If these are of devices that you can live without and replace them with generic drivers, then you should do it. I am suggesting this, keeping in mind that the upgrade is essential for you. You can choose to remove the hardware and install it again, and this time uses an alternate drive instead of the one you downloaded.

Source Here TheWindowsClub

  • Open Device Manager using Win +X followed by M
  • Locate the hardware that is causing the problem.
  • Right-click and choose to Uninstall the device
  • Once it is removed, click on Action > Scan for hardware changes
  • The device will be detected, and Windows will install the driver.

3) Upgrade in Clean Boot State

What is Clean Boot State in Windows 11/10/8/7? How to perform Clean Boot? What is the difference between Safe Mode and Clean Boot State in Windows 11/10? Well, most of us are familiar with Safe Mode in Windows. When you restart your Windows computer and start pressing the F8 key on your keyboard, you will enter Safe Mode. The Safe Boot mode uses a minimal pre-defined set of device drivers and services to start the Windows operating system.

On the other hand, there is also the Clean Boot State which is used to diagnose and troubleshoot advanced Windows problems. If your computer is not starting normally, or if you receive errors when you start the computer that you cannot identify, you could consider performing a “clean boot.”

To enter Clean Boot State, type MSConfig in start search and hit Enter to open the System Configuration Utility. Click the General tab, and then click Selective Startup.

When you start the computer in clean boot, the computer starts by using a pre-selected minimal set of drivers and startup programs. Since the drivers will not be loaded, you will be able to upgrade, but make sure to either upgrade or roll back the driver after everything is complete.






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