Initial sales of the Windows 8 operating system are said to be "well below" Microsoft's internal projections. Citing a "trusted" source, Paul Thurott of Supersite for Windows said Windows 8 is off to a weak start, but Microsoft doesn't believe sales have been affected by the software itself. Instead, the thinking in Redmond, Wash., is said to be that PC makers have offered "lackluster" designs, along with limited availability. That disappointment with Microsoft's PC partners is said to have further reaffirmed the company's strategy with the new Surface tablet, which is the first computer designed and manufactured by the company...