After developers and IT pros pelted Microsoft with complaints, the company has backtracked and decided to grant them access to the latest Windows 8.1 build instead of making them wait until mid-October.When Microsoft sent to PC and tablet makers two weeks ago the latest pre-release version of Windows 8.1 -- the so-called RTM (release to manufacturers) build -- it broke with tradition and kept developers and IT pros out of the loop, enraging them.