In order to watch video content you need to enable javascript and install Flash player version 8 or above.

Currently playing »

Bill Gates' greatest hits and misses

June 30 marks Gates' last official day of work at Microsoft. While the software giant's founder will continue on as chairman, he will no longer be a full-time employee. ZDNet's editor in chief, Larry Dignan, rates Gates' many conference keynotes and product launches, separating the successful from those that missed...