Software giant Microsoft officially ended support for Windows 7 on Tuesday, bringing a long-awaited technical close to the 10-year-old operating system. Microsoft has been warning users for months it would cease support on Jan. 14, even with a third of all personal computer users still running Windows 7. Windows 10, which the company said has 900 million users, only recently surpassed Windows 7 in market share. "While you could continue ...