Microsoft Corp is reducing the price of Windows 8.1 for manufacturers of low-cost computers and tablets by 70 percent to compete with cheaper products like Google Incs Chromebooks, Bloomberg News reported on Saturday, citing sources familiar with the program. Computer makers will be charged $15 to license Windows 8.1 and pre-install it on devices retailing for under $250, compared with the standard fee of $50, Bloomberg reported. Sales of Microsofts Windows 8 system, including its latest Windows 8.1 version, have been relatively slow since its launch 15 months ago. More than 200 million Window 8 licenses were sold, lagging Windows 7, which sold 240 million within its first year, according to Tami Reller, head of marketing for Microsoft.