Jury out on Windows XP sales

C|Net | at | by Mike

November retail sales of Windows XP weren't so hot. But is the operating system a flop? Maybe not, analysts say. Microsoft's biggest operating system launch ever has failed to generate enough retail sales to push past its predecessor, Windows 98, according to market researcher NPD Intelect.

But retail sales are not the key measure of an operating system's success, analysts say. Copies sold at retail are "boxed" upgrades or full versions for consumers looking to move to the newest version of Windows. The more accurate measure is client licenses sold to PC makers or businesses. By that accounting, analysts say, Windows XP already is primed to have the most successful first year on the market of any Microsoft operating system.