Human Immunodeficiency Virus (HIV)-1 positive status

HIV ribonucleic acid (RNA) level \>=5000 copies/mL

Antiretroviral treatment-naive

Absolute Cluster of Differentiation 4 (CD4) cell count meeting 1 of the following criteria:

\<350 cells/mm\^3

Screening CD4 \>=350 and \<=500 cells/mm\^3 ONLY if at least 1 of the following conditions apply:

* Screening HIV RNA level \>100,000 copies/mL, or

* CD4 decline \>50-100 cells/mm\^3/year, or

* Age \>=55 years

Any CD4 cell count, if participant has a history of an acquired immune deficiency syndrome-defining illness

Medically stable

Phase IIB Pilot of Atazanavir + Raltegravir