First Run II results with the Dzero detector at the Fermilab Tevatron

We report the first results obtained by the Dzero Collaboration using data from Run II delivered by the Fermilab Tevatron. With the data sample collected until May 2002, we have commissioned and calibrated all of the detector components. Here we will present the current performance of all the detector subsystems. We also report the first physics signals, with emphasis on first measurements of production cross sections of W, Z bosons in proton anti-proton collisions at the new center of mass energy of 1.96 TeV and searches for particles predicted by theories beyond the Standard Model.