Hackintosh displays cancel icon as boot logo instead of apple logo

Hey guys,

So shutdown my hackintosh last night and booted it back up today and all of a sudden it won't get past the boot logo. It displays what I can describe as the cancel signal i.e a circle with a diagonal line through it. I haven't changed anything. A few updates may have been installed via the Apple store I'm guessing. Any ideas what's going on? Anyway to salvage without reinstalling?