instinct blocked at start up screen

I just connected my watch to my computer to get updates. 

Garmin express wanted to update so I let hi do it and now my watch keeps chowing the GARMIN start up screen.

I can shut it down, but when I restart the screen appears again and doesn't disappear.

When I connect it back to y computer, It is not recognized by garmin express and not by my computer.

So now I have a useless watch.

Anyone any thoughts jhow to fix my problem?