[1] My other concern is why the update failed.
[2] Does it matter that I deleted the recovery partition when I migrated over to an SSD?
[3] I think I might disable the auto-update feature.
A1. Assuming you're referring to Win8.1 failing to install <EDIT> on the SSD drive </EDIT> & throwing a 0xC1900101 error, I'd have to know much more about the computer before I could even venture to hazard a guess. I can tell you that you're certainly not alone! => http://goo.gl/Y9Lgtt
A2. As far as installing Win8.1 is concerned, no. But if you need to do a Refresh or a Reset, you'll need to use the discs that came with the computer or the set of Recovery discs you created <EDIT> and saved to the USB drive </EDIT> earlier to do it.
A3. Why not just change your AU setting to the Check for updates but let me choose... option? That way, no updates will download without your approval (but any approved updates will automatically install without any further prompting).
REMINDER: Support for Win8 ends in January 2016. Win8.1 must be installed by 12 January 2016 or the computer will NOT be offered ANY further updates.
[Last Revised (as marked) - 06 Sept-14, 21:07 UTC]