It looks like all the positive buzz round Microsofts new Windows 7 operating system paid off in sales. Windows 7 sold 234 percent more copies during its first few days on the market than Vista did during the same period of its release, according to research by the NPD Group. NPDs data covers the week of Oct. 18 to 24. Windows 7 only launched on the 22nd, but these numbers also include pre-sales from the days before. While the reviews werent universally positive, Windows 7 was seen as a huge impr