Microsoft, do you even care what your shitty updates are doing or have you just given up?

Not only did the update start immediately after waking up from standby, it also had to brighten up my day by deleting everything afterwards.

Turns out the anniversary update gets confused by dual boot systems and then just deletes all partitions. And apparently they didn't manage to fix this for months now.

Can't wait for the coming "Creator's update", always wanted to see how an exploding PC looks.