Hello
The error from the log is:
Failed to get capacity for \\.\PhysicalDrive0: error opening disk device: Unknown error 32 (0x20) (32)
32 is Windows error meaning "The process cannot access the file because it is being used by another process."
I'd suggest you enable the built-in 'Administrator' account and test with it (and still run GUI as administrator).
Another possible reason could be some special software that takes exclusive access of the disks/volumes. Since there is an HP recovery partition, there may be some special driver associated with it that you could try to stop.
HTH
Plamen