Microsoft's Hotmail, the free webmail service used by hundreds of millions of people around the world, was phased out Friday, as the US tech giant completed a rebranding to Outlook.com.
Microsoft kicked off sales of its revamped Windows 8 system and Surface tablet Friday amid mixed reviews as the tech giant ramped up efforts to compete in a market shifting rapidly from PCs to mobile devices.
A reality blast of disappointing earnings from a clutch of US business heavyweights wiped out midweek gains Friday as US markets suffered another poor week.
Microsoft on Tuesday teased the release of the next generation of Internet Explorer by unveiling an online game crafted to show that websites can be as richly playful as "apps."
Google and Microsoft have introduced new champions in the fiercely competitive smartphone arena a week ahead of what is likely to be the hotly-anticipated debut of a next-generation iPhone by Apple.
Apple on Monday dethroned longtime rival Microsoft as the most valuable company in history based on the value of its stock, which climbed to around $622 billion.
Microsoft posted its first ever loss on Thursday, shedding $492 million in the fourth quarter due to a massive $6.2 billion write-down to reflect the slump in value of its online operations.