Ballmer, wrapping up an initial presentation, appeared to address concerns that the new Windows 8 interface, which emphasizes touch, has annoyed some early PC reviewers.
"Windows 8 shatters perceptions of what a PC now really is."
Later, he addressed a concern that some PC users have had with pre-release versions of the software — that it lacks a familiar "Start" button containing programs, settings and other controls. Microsoft has said its new interface, with its automatically updating tiles on the opening screen, replaces that button.
Asked by an Associated Press reporter if he might bring the "Start" button back, Ballmer replied, "You've got a whole screen as a 'Start' button," while hurrying off.
Nakashima contributed from Los Angeles.
Copyright 2012 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.