Troubleshooting of errors updated from Win8 to Win8.1

Recently, many of my friends experienced the error "unable to update to windows8.1" when upgrading from Win8 to Wind8.1, leading to an upgrade failure. If this is the case, take a look at the following troubleshooting methods.

Sorry, we cannot update Windows 8.1. We have restored this computer to a previous version of Windows 0xc1900101-0x40017"

Error message: "unable to update to Win8.1

Error message: "unable to update to Win8.1

Possible causes:

1. Anti-virus software (disabled or uninstalled first)

2. Problematic drivers

3. Some external devices that are not compatible with wind8.1

Solution:

1. Check whether your model can be upgraded to Win8.1.

2. We recommend that you temporarily remove all external devices that are not pre-installed with Lenovo, such as the mouse, keyboard, printer, and camera.

3. We recommend that you back up important personal files and use the one-click recovery function to restore the computer to the factory status. For operation methods, see.

4. Uninstall software and drivers that may affect updates, such as anti-virus software, power management, and graphics driver.

5. Install all Windows update updates, and then try to update Win8.1 in the App Store.

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