The toolbox you see on your right hand side is a Instruments toolbox.It contains equipments such as
Then click Restart to complete your installation.After the installation is complete click next>.After that the installation will start.Click on I accept Lisence agreements and then click next>.Set your Destination Directory for installation and click on next>.click on install this product for evaluation then click next>.Click on setup in your downloaded NI software.evaluation.
NI Multisim 12.0 gives 30 days trial use of software.You can extend this period to 2 years if you follow the installation method given below.I had also given the installation steps in picture given above.