Initially my VSS was set to start manual too, but at a similar problem (on Windows 7) I was advised to set it automatic; then it helped.
Sorry, I don't know Event Viewer, how can I see it?
Boot media is not used to make the backup. It is for restoration in case the OS is down.
I tried all variations to backup selected partitions.
I try to backup selected partitions from my internal hard-disk to an external one, so space cannot be a problem.
I don't know the built in imaging utility, how can I use it?