"Couldn't update to Windows 8.1 - 0xC1900101 - 0x40017"

Further problems found after computer message re installing your previous version of Windoze. (sic).

All is not returned as before-I had issues with IE 10, which would not work on the Charm screen and had to 'repair'.  The software for my remote camera failed, re-install.  Was unable to sync with my Archos tablet, re-install and who knows what else. Oh yes one other thing I did not use profanity in my earlier comment but instead used a bit of Olde English grammar referring to a male chicken+up. How on earth Microsoft can obliterate such a simple expression is unbelievable when one considers the variety and amount of expletives that are freely used on American TV.

Many, many thanks to all those who responded to my earlier post.

triron. MOG.

I spent about six days on the phone with tech support and it got all the way up to level three without success.  Over twenty attempts in total.  At the end of the day the problem was solved with the "Nuke & Pave" approach.  

Fortunately I had backups but the act of re installing programs and apps is a pain and should not be necessary for an upgrade let alone an update to a point release.  Here's hoping Windows 9 is less problematic...

I have been following this thread for the past couple of weeks, and it seems like few people were able to resolve their problems.

I am running a custom build with NVIDIA graphics; I did what Microsoft said, but when the update failed yet again I decided to contact their support center instead of going program by program. Apparently I had corrupted files, and they used a tool to repair my Windows 8 install as well as deleted from Windows Store my original download of Windows 8.1. The customer service representative took me through the update process with no problem. It was a long experience, but it was worthwhile because I am now at Windows 8.1 on my home PC, with no problems as of yet. Believe it or not, it was AAA service. If you're still having problems, I suggest chatting with one their service representatives like I did or shooting them over an email with your PC information.

I have tried the .iso way, but nothing works.. I cant even do a Reset or Refresh of Windows 8 without it crashing.. Even tried using automatic repair from my Windows 64bit PRO dvd, still crashing..

I have a RBP 17" 2013. I had the same problem. Go to razerzone.com , support, systems, rbp 2013, software & drivers, "Windows 8.1 Upgrade Guides", download.

These instructions worked for me. There has since been an update to the NVIDIA driver, which has been working fine for me. Until this came out, when I would try to update the NVIDIA driver (second week of oct) I would get BSOD. Everything seems to be working fine now. And there is an SBUI update that fixed a few issues I was having with that. Good luck!

I'm having this same problem with my custom Rain Computers desktop computer with dual ATI V7800. I've tried 3 times with all the updates that even windows didn't find, still bsod. I'm about to try again with based on this guy's suggestion:

"I fixed it with these things:

1. Uninstalling DAEMON Tools, TuneUp
2. via CMD (as admin) -> DISM.exe /Online /Cleanup-image /Restorehealth
3. Disabling Intel LAN, Azalia Audio, USB 3.0 via BIOS"

from

http://social.technet.microsoft.com/Forums/windows/en-US/1e1adbc5-b78e-4b2a-9661-4139d13cc7d3/0xc1900101-0x30018-error-during-update-restore-win8?forum=w8itproinstall

Obviously, your system will vary. I'm going to see what happens and I'll report back.