I do not understand why this issue is not being taken more seriously. This error causes the computer to roll back to its previous state, and as a result, every patch that has been released after KB2919355 is never successfully installed. This means that I have been running an unpatched machine for the past two months.
I can't believe the only solution is to waste an entire afternoon with MS support so that they basically reformat my PC, leaving me to reinstall everything again. I cannot express how frustrated I am at MS right now.