{"id":2901,"date":"2024-02-21T21:52:07","date_gmt":"2024-02-21T21:52:07","guid":{"rendered":"https:\/\/www.auslogics.com\/en\/articles\/?p=2901"},"modified":"2025-10-17T23:46:54","modified_gmt":"2025-10-17T23:46:54","slug":"fixing-installation-failed-in-safe_os-phase-with-an-error","status":"publish","type":"post","link":"https:\/\/www.auslogics.com\/en\/articles\/fixing-installation-failed-in-safe_os-phase-with-an-error\/","title":{"rendered":"Fixing Installation Failed in Safe_OS Phase with an Error"},"content":{"rendered":"

If you are looking for the best way how to fix 0xC1900101 \u2013 0x20017 error, you have definitely come to the right place \u2013 we know how dispiriting this issue is and have done our utmost to compile an exhaustive list of the proven fixes for this problem.<\/p>\n

Getting a message saying, \u2018The installation failed in the SAFE_OS phase with an error during BOOT operation\u2019 while trying to upgrade to or install Windows 10 is, by all accounts, a most undesirable experience. The error actually crops up at the moment of joy, right when the installation of Win 10 hits 100 %, and makes the process fail.<\/p>\n

This error is quite difficult to account for, since it is impossible to point to one clear cause of this issue: faulty peripherals, bad drivers, buggy registry entries, incorrect system settings, malfunctioning hardware, PC junk, and BIOS issues make up the list of possible culprits. This means you should work your way down through the methods below, giving each of them a try. We do hope your troubleshooting adventure will not take too long, as your triumph might be just around the corner.<\/p>\n

So, it is time to learn how to fix 0xC1900101 \u2013 0x20017 error in order to ensure a smooth upgrade to Windows 10:<\/p>\n

1. Disconnect all your external devices<\/h2>\n

The point is, some of your peripherals might be responsible for the Windows 10 installation failure on your PC. Thus, unplug all your external pieces of hardware, such as USB hubs, flash drives, or Wi-Fi adapters, before performing an upgrade.<\/p>\n

2. Remove conflicting drivers<\/h2>\n

If you are trying to upgrade from Windows 7 or Windows 8.1, you should uninstall your Bluetooth and Wireless Network drivers, since they have been reported to be incompatible with Windows 10.<\/p>\n

To remove them, use the instructions below:<\/p>\n

    \n
  1. Press the Windows logo key and X<\/code> (simultaneously).<\/li>\n
  2. Select Device Manager<\/em> from the list.<\/li>\n
  3. Locate your Bluetooth<\/em> driver. Right-click on it and select Uninstall<\/em>.<\/li>\n
  4. Find your network driver. Uninstall it.<\/li>\n<\/ol>\n

    To resolve your issue, you might need to enter your BIOS and disable the drivers in question:<\/p>\n

      \n
    1. Restart your PC and enter your BIOS at boot (the exact combination of keys depends on your PC model and manufacturer).<\/li>\n
    2. Navigate to the Advanced<\/em> tab. Locate the Wireless section<\/em> and press Enter<\/code>.<\/li>\n
    3. Disable the Internal Bluetooth<\/em> and Internal Wlan<\/em> options.<\/li>\n
    4. Go back to the main screen (press the Escape<\/code> button).<\/li>\n
    5. Save your changes.<\/li>\n<\/ol>\n

      Now try to install Win 10 on your computer and check if the issue has gone.<\/p>\n

      3. Update your drivers<\/h2>\n

      Windows installation issues often stem from out-of-date or corrupt drivers, which means you should regularly scan the horizon for new updates. With that said, this might seem quite an onerous burden if you prefer to take care of your drivers yourself: you should know the exact models of your devices and what driver versions are recommended by the manufacturers. Searching for the latest drivers and installing them on your PC is by no means a quick procedure. As a result, your update may turn into an epic struggle.<\/p>\n

      The good news is, you can automate the process. Check out the previous fix and use the instructions for running the built-in Device Manager tool. Locate the device which driver you wish to update, right-click on it, and configure the manager to search for the necessary software online. Nonetheless, this method has its drawbacks. First, updating all your drivers one by one is extremely time-consuming. Second, Device Manager may fail to find the versions needed.<\/p>\n

      \r\n\t
      PRO TIP<\/div>\r\n
      The third method of fixing driver issues implies using special software. For example, you can opt for Auslogics Driver Updater:<\/a> with just one click of a button, you will have all your drivers fixed or updated.<\/div>\r\n
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      4. Improve certain startup settings<\/h2>\n

      The problem might not be that deep-rooted: setting certain services to automatic is a reportedly effective way how to fix 0xC1900101 \u2013 0x20017 error. Here is what you should do:<\/p>\n

        \n
      1. Press the Windows logo key + R<\/code> shortcut to open Run<\/em>.<\/li>\n
      2. Then type services.msc<\/code>\u00a0into it. Hit Enter<\/code>.<\/li>\n
      3. Locate the following:\n