Businesses who are thinking about upgrading more than a handful of computers between now and the October 22nd release of Windows 7 may want to hold off. That is, assuming the companies want the latest OS. While it’s true that Microsoft is offering a free upgrade to its new OS, the company has made little mention of the “fine print” that limits the number of free upgrades to 25. Gartner analyst Michael Silver is calling attention to this limit with his latest research note. In his note, Silver writes, “Microsoft