According to Devil Mountain Software, by the end of July, 86 percent of the machines in its community-based exo.performance.network (Xpnet) running Vista had been upgraded to Service Pack 1 (SP1). That was a 17-point increase over the 69 percent who reported running Vista SP1 at the end of April, six weeks after Microsoft released the major update.
“There was pent-up demand for Vista SP1,” said Craig Barth, chief technology officer at Devil Mountain. “If users are frustrated with a platform, they're going to be more likely to go out and snag any update that purports to fix the problems.” Meanwhile, Windows XP users have apparently felt less pressure to download and install that aged operating system's Service Pack 3 (SP3), which was released in early May.
The service-pack uptake difference between Vista and XP has been dramatic. Where more than two-thirds of the network's Vista users had grabbed SP1 within six weeks, fewer than half -- just 47 percent -- of XP users had updated to SP3 by the end of July, more than 12 weeks after Microsoft first posted it for download.