Filed under: Desktops, LaptopsIt's not the first time it's dabbled in subscription-based PCs, but Microsoft looks to be taking things up another notch, with it now making a fairly big push into Russia. To that end, the company's teamed up with Russian cellphone operator Mobile TeleSystems OJSC, which will be offering the subscription-based PCs to all 85 million of its customers as part of Microsoft's Unlimited Potential program, although there's no word on exactly what the PC's will cost just yet. Details on the PCs them