Last year, when Microsoft announced that Vista would be delayed for the umpteenth time, there was some fear that by releasing it after Christmas, it would result in a significant lull in computer sales. But this thinking assumed that people were actually enthusiastic about Vista and wouldn't want to buy an older version of Windows with a new one coming out soon. In retrospect, that assumption seems to have been quite misplaced. Not only is Vista not leading to higher computer sales, but there's a significant subset of consumers that actually would prefer to buy an older version of Windows. This demand has prompted Dell to start selling a few PC models preloaded with Windows XP, which the company had discontinued earlier this year. This can't please Microsoft, which would like to concentrate, as much as possible, on supporting its new operating system. But with so many complaints about the resource demands of the operating system, and the amount of crapware that it comes bundled with, it's no surprise that many people are happy to go with the old system.