Yes, finally it works! Great advice here.

Had to do the power on-off thing until I got in safe mode, tried several things but uninstalling hp simple pass did it.

One little tip, when you're adding the registry key to enable msiserver to be activated as a service in safe mode, pay attention to which safe mode you're in: minimal or network. I got stuck for some time adding it to 'minimal', while I was in fact in safe mode with network options.

Many thanks!