Bugger. I had a bunch of stuff written and closed the window trying something.

The Unallocated space is what you want. You delete all 3 partitions and they will join in to one big contiguous space. Then right click and create new volume.

Most "decent" malware will resurrect itself and have multiple copies hence the 4 copies of the same file you found. If you delete one, it just gets restored from one of the others.

I do think it would be possible to get rid of from Windows, but it's been a while since I had to remove this sort of stuff from a PC.

My steps in rough order would be
1) Try and remove it manually but that will require some experimentation finding which bits to kill or remove first. Your scans don't show it killing applications. You really need to get the running applications stopped or they'll just fix any other deletions/changes you make.

2) Try and identify it exactly and then look for a specific guide to remove it.

3) Try windows 10 safe mode. That might be enough to prevent it running after booting. You really need it to not run when starting. Then do a scan and clean.

4) Boot with an offline scan like those linked above. That should be able to clean enough.