Lots of this type of software available Geofrey, not heard of this particular site so don't know if it's any good or how secure it is but 10 years ago I had a franchise & they supplied you with a commercially available software so they could log in to your system & help you out or maybe it was just so they could spy on you lol.
It wasn't free but there was even a company advertising a similar sort of thing on the telly a few years ago.