How to fix windows 11 unable to update error 0xC1900101

Errors starting with 0xC1900101 are usually driver errors. If you see these error codes Try the following steps first to resolve the issue.

1.Make sure your device has enough free space. Your device needs at least 16 GB of free space to upgrade to a 32-bit OS, or 20 GB to a 64-bit OS. For more information, go to Free up drive space in Windows

2. Run Windows Update a few times. Download and install any updates available in Windows Update, including software updates. Hardware updates and third-party drivers Use the Windows Update Troubleshooter to fix Windows 11 update errors.

3. Check third-party drivers and download updates You can find third-party drivers and installation instructions for hardware you add to your device on the manufacturer’s website.

4.Remove the additional hardware. Remove all external storage devices, including drives, docks, and and other hardware where you plug in devices that aren’t necessary for basic functionality

5. Check the device manager to fix the error. In the search box on the taskbar, type device manager. Select Device Manager. from search results In the window that appears Look for the device with a yellow exclamation mark next to it. (You may need to select each type to switch to the device list.) Press and hold (or right-click) the device name and select Update Driver Software or Uninstall. to correct errors

6.Remove third-party security software Make sure you know how to install your programs. And having a required product key, Windows Defender will help protect your device in the meantime.

7. Fix hard drive errors In the search box on the taskbar, type command prompt. Select Command Prompt. From the search results list In the window that appears, type chkdsk/f C: and press the Enter key. The repair will automatically start on your hard drive. And you will be asked to restart your device.

8.Restart your computer in Windows. See How to perform a clean boot in Windows.

9.Restore and repair system files In the search box on the taskbar, type command prompt. Select Command Prompt. From the search results list In the window that appears, type DISM.exe /Online /Cleanup-image /Restorehealth and press the Enter key.

Credit : https://support.microsoft.com