Connect to VNC Console
You can connect to an instance by a VNC console. Click on one instance and then select the "Console" tab, as shown in the picture below.
Then click connect in order to connect to the console.
A message is displayed, informing the user on whether the console of an instance is reserved by another user, as displayed in the following image.
In case you are using a windows instance, select Ctrl+Alt+Del to connect to the VM, as shown in the following image.