
To date, almost 400 posts on that thread - plus hundreds more on several additional, similar threads - have led to a small handful of customer-discovered solutions, but no definitive workaround that everyone can apply. There is no explanation as to why the update couldn't be completed. We Couldn’t Complete the Updates Window's 10, Undoing Changes Fi圎asy fix for 'We couldn't complete the updates / Undoing changes' which occurs in Windows 10. We've restored your previous version of Windows to this PC. Sorry, we couldn't complete the update to Windows 8.1. When the system boots up after this, I get a message saying: It then tries to recover the installation, fails, then restores Windows 8. Each time I try, I get to the point where it is "getting my devices ready", then the PC restarts to a blue screen with error message.

Martin Dixon posted the original description on the Microsoft Answers forum, shortly after the Windows 8.1 upgrade rolled out: I have downloaded the Windows 8.1 update from the store but cannot get it to install. 18 I wrote about the show-stopper bug for many people upgrading from Windows 8 to Windows 8.1. Because after two weeks of trying, Microsoft still hasn't figured out what's causing the problem, and your input may help. But if none of the remedies offered here get you upgraded, please head to the Microsoft Answers forum and post details about your configuration.

If you've been having trouble upgrading from Windows 8 to Windows 8.1, and are encountering Blue Screens marked 0xc1900101 - 0x40017 or 0xC1900101-0x20017, 0xC1900101-0x40019 or 0xc1900101 - 0x30018, there may be a fix for your problems.
