Windows Vista 10-15% slower in games than Windows XP

Microsoft has now announced to their partners that they can expect 10-15 percent worse gaming performance with Windows Vista
compared to an equivalent game in Windows XP. The reason for this is simple, you need to have the 3D desktop in the background
all the time. If Microsoft is taking the “better safe than sorry” road is yet to be seen, but the ones who have tried out Vista already know that the performance is a mixed blessing and that the system uses more resources than Windows XP does. With these early beta versions and release candidates, this is partly due to debuggers, but it would be a bit harsh to blame the debugger for all of the hogging.