320 Road Runner dash camera?

Prestigio 320 Road Runner dash camera only had it from Argos 3 days ago from so not had chance to use it in car yet.

Two problems
1.When connected to PC the camera comes on automatic, when unplugged it turns off.(Battery full charged).
The problem:- When hand held and manually turned on by the on/off switch I then cannot turn it off again. I have to reconnect it to the computer and it will turn off automatically when unplugged again .

2. The USB port on my computer shows in turn, all attachments I connect, three cameras and a hudl2 but will not show the dash camera. ?

I could put the micro card in to my Hudl but haven't had a chance yet to run a trip and test the hudl will accept the info from the card.
Many thanks in advance