Windows 11 Installation Assistant Error 0xc00000f0

When you try to upgrade to Windows 11 using Windows 11 Installation Assistant, the error code error code 0xc00000f0 may appear at 79%. Or the setup gets stuck at Step 3 of 3: 99% during installation for more than 6 hours.

windows 11 installation assistant hangs at 99%
Installation Asistant hung at 99%


The error code 0xc00000f0 only occurs when using the Windows 11 Installation Assistant on some systems. To prevent the aforementioned issues, use other methods, such as the Media Creation Tool or the ISO, to do an in-place upgrade to Windows 11.

Download the Windows 11 ISO.

Right-click on the ISO and choose Mount. It’s assigned a drive letter.

Run setup.exe.

windows 10/11 iso setup.exe

In the initial screen of the Setup dialog, click “Change how Setup downloads updates”, and click “Not right now”.

windows setup stuck checking for updates - disable dynamic update

By clicking the “Not right now” option, you’re disabling dynamic updates to reduce the errors during the setup process and speed up the installation process drastically, especially on systems with a broken Windows Update feature. Refer to the article Windows 10/11 Upgrade Stuck at Checking for Updates for more information.

Using an ISO or MCT (and disabling dynamic updates) is recommended if the Windows Update client on the computer is broken. One downside of disabling dynamic updates is that you need to install the latest updates via Windows Update after finishing the setup.

Follow the on-screen instructions and complete the in-place upgrade. Unless otherwise stated in the Setup dialog, your apps and data will be kept by default during the upgrade.

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Ramesh Srinivasan is passionate about Microsoft technologies and he has been a consecutive ten-time recipient of the Microsoft Most Valuable Professional award in the Windows Shell/Desktop Experience category, from 2003 to 2012. He loves to troubleshoot and write about Windows. Ramesh founded in 2005.

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