Hello played for 15 hours no problem, now the game wont start

here is my log

0.001 2016-03-07 13:07:32; Factorio 0.12.26 (Build 17762, win64)
0.001 Operating system: Windows 10
0.001 Program arguments: "D:\Program Files (x86)\Steam\steamapps\common\Factorio\bin\x64\Factorio.exe"
0.001 Read ...