Cannot delete partition

I have the same trouble with an Acer Switch 10 with windows 8 that wouldn't boot after downloading updates.
I have gone through numerous attempts to no avail.
I first made a bootable USB stick that doesnt work.
It slowly gets to the stage where I have to delete the Partitions but will go no further.

The error is

We couldn't delete the selected partition error 0x80070079

I have gone into Diskpart & did all the commands, List, Clean etc & cannot delete the partition also.
The error is

The semaphore timeout period has expired.

I have gone through these procedures many times with the same result.
Have set the BIOS to boot from the USB & disabled secure Boot & changed many settings as possible & set them back to default.

Try deleting ALL partitions first. Like this:

diskpart > list disk > select disk # (# is the disk number with partition you want gone) > clean

if that was already tried reinstalling windows might be the only option, assuming there is no hardware issue.