This is a single-center, randomized, two part, open-label, crossover study in healthy adult subjects to assess the oral bioavailability of three GSK2248761 Wet Bead Milled (WBM) tablet formulations manufactured by three different processes relative to the GSK2248761 WBM capsule formulation (Part A) and the effect of a moderate-fat meal on the bioavailability of the selected WBM tablet formulation (Part B).