I have build 10041 in different stages on three SSDs. Have had no problems installing updates including new builds in the past. Build 10049 downloads (100%), but installation always aborts - even on one SSD which has an absolutely pristine 10041 - installed with no problems from an iso - and not touched in any way since, except to backup image with Macrium Reflect from a USB to an Lacie USB external storage disk. Can anyone provide an answer to this problem? I've totally wasted many hours with this problem and am beyond frustrated.