I have exhausted all of the resources I can find on the subject and non have fixed my problem so I was thinking that EMC may be able to help.Problem:I have been trying to upgrade my windows 8 laptop (came with windows 7 originally) to 8.1. Sadly, I receive the error "0xC1900101 0x2000C" every time I run the update. During the reboot, my laptop shuts off without warning. When I turn my pc back on, it restores windows 8 and gives me that error. I have been told it is a driver issue but I have no clue which one or how to begin looking.What I have tried:Everything posted here. I also ran another fixit utility from Microsoft but no help. Additional information:My laptop is Toshiba and is supported for the update to windows 8.1. I have checked their site and ensured I had the latest drivers.Anyone have suggestions or experienced the problem?