My error code is 0x800F0806. We have two identical computers bought recently (still under warranty). Came loaded with 8.0, I updated both to 8.1. Both are 64-bit. I set both of them up identically. Partitions on both are the same; I left them as they came. One has installed KB2919355 with no issues, the other continues to fail. Loads everything, installs to 100%, then gives error... we couldn't complete the updates..." rolls back. View update history reveals error code 0x800F0806.
I have tried all fixes presented, including DISM. Indicated that the corrupt file was fixed, so I was encouraged to try updating after a reboot, only to have the same 40 minutes wait while the file is being installed and then rolled back.
Someone mentioned I should find a moderator that could give me a MS case number, but I don't see how to do this.
Please help!