Workaround for "Cannot update to Windows 8.1"

Windows 8.1 is the first system version of Microsoft's history that can be directly and freely updated, but this should have been a very simple update, but it was a lot of problems, a large number of users reported unable to complete the update, even if the upgrade has encountered such errors, not to mention that Windows RT 8.1 is directly retracted.

Online forums, there have been a large number of Chinese and foreign users have been "0xc1900101-0x40017" error, prompted "Sorry, we can not update to Windows 8.1, we have already restored this computer to a previous version of Windows." "Although no one can understand what this line of code means."

Feedback from netizens, the error experience is basically the same, are in the update process when the desktop settings are suddenly blue screen, and then restore the installation, and then report failure, and then restore to Windows 8, then the error code hint.

Based on experience, this almost determines that there is a conflict with the user's system settings, software-driven somewhere, but because it involves too many users and the configuration of the computer is not the same, it is an impossible task to find a specific source.

Microsoft has finally responded somewhat. One support engineer explained that the problem was caused by a driver bug check during the second reboot, and recommended that users check all installed updates.

Unable to update to Windows 8.1

0xc1900101-0x40017

Can be caused by the following reasons:

1. Antivirus software

2. Problem-driven

Solution:

1. First please confirm whether your model supports upgrade to Windows8.1;

Hardware requirements to support Win8.1

Windows 8.1 can perform well on the same hardware that supports Windows 8:

· Processor: 1 GHz or faster

· Memory: 1 GB (32 bits) or 2 GB (64 bits)

· Free hard disk space: GB (32-bit) or GB (64-bit)

· Graphics card: Microsoftdirectx 9 graphics device with WDDM driver

Warning

· In order to use Windows 8.1, you must log on to your computer using a Microsoft account. The option to create a local account will be available in the final release version of Windows 8.1.

To use certain features, you also need to meet the following additional requirements

· For Windows 8.1 64-bit installations, your CPU must also support cmpxchg16b, PREFETCHW, and LAHF/SAHF.

· To use touch, you need to support a multi-touch tablet or monitor.

· To access the Windows store and download and run the application, you need a valid Internet connection, at least 1024 x 768 screen resolution, and a Microsoft account.

· Internet access (may generate ISP charges).

2. It is recommended that you back up important personal files, use a key restore function to restore the computer to the factory state;

When your PC is shipped with a genuine Windows 8 system, it is now upgraded to Windows 8.1. This document will take you step-by-step through recovery to Windows 8

3. Uninstall software and drivers that may affect updates, such as antivirus software, power management, graphics driver, etc.

4. Install all Windows Update Update patches, and then try to update Windows8.1 in the application store.

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