Yea I've started using this recently and had that error at times too and it's very unhelpful. I'm not sure I can help but let me ask you a couple questions.
What version of Windows are you using?
From the control panel where you stop and start apache, when apache is selected click the Configure button.
In the next screen click the button to open the error log.
Paste the contents in here. Again not sure I can help but maybe that would help someone else figure it out. . . .