Norton Bootable Recovery Tool

Dear community member, I am in great difficulties pls I need a solution. I have create an image of NRBT in my USB key. All the things has been sucessfully downloaded but I am unable to perform  a recovery scan. Pls show or guide me how to perform e recovery scan & how to  restart computer with the Norton bootable recoverably tool  using the USB key. 

Thank u !!! pls guide me!! Its urjent