Unity Project wont build

I cant get Unity to build my project. At a certain point the progress bar just stops moving. I could leave it for hours and it still wouldn’t work. Unity isn’t freezing as I am able to click the cancel button and do whatever… The only thing I can’t do is build the project.

Specs: Unity 5.0.0f4 (64 bit) Windows 8.1 (64 bit)

above is what the screen looks like… everything is fine except for the building player dialogue box and loading bar… it just wont move!

Thanks jodev, The forum posts you linked to didnt work, however, they gave me ideas for what keywords to search in google and helped me find a video tutorial and i fixed the problem myself.