Rejoinder The definition got updated this morning to 1.155.1992.0 dt 8/11/2013 through windows update in the normal course.
Finally got today 8/11/2013 definition 1.155.2002.0 through windows update(5 Mb). cheer. It seems that Microsoft has problems with the updates. You got 1.155.1992.0 and here in Brazil I received 1.155.2002.0. Your definitions I downloaded manually yesterday in the afternoon.
Ultimate live Yes. I have now got 1.155.2002.0 update also but a 88kb file. I didn't notice the size of the earlier one. FYI
The latest one was really 5 MB. But after this update, Windows Defender is getting updated automatically again.