2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/486111. We discuss the opportunities of complete Higgs boson discovery at different colliders. Main conclusion here is: Photon collider is the best for this goal. 2. We discuss how to use the Higgs boson (after its discovery) as the window to a New Physics. Main conclusion here is: Higgs boson production in gluon and photon fusion together with production in process $eγ\to eH$ provides very good window to a New Physics with the scale $Λ\gg M_H$.13 pages, 6 .ps and .eps figures, LaTeXHigh Energy Physics - Phenomenologytext