Blown capacitors or large amounts of dust within the PSU's transformer? Those were my first thoughts when I clicked the TotD link. God, I can't imagine buying a premade computer just to have this happen because of their cheap ass hardware choices.
When it comes to desktops, just save yourself some money and learn to assemble the stuff yourself. Get a case, install the PSU, mobo, CPU and heatsink, RAM, video card, drives, connect the wires, close the case, boot, install and update your OS, install important software, backup, install games, ..., profit.