I have just downloaded Allegro, but I ran into this problem.
I haven't the slightest idea how to include the allegro files needed to use their functions. I'm not foolish enough to just bring up a new project and think that adding "#include <allegro.h>" will be enough, I'm fairly certain I have to mess with the Linker. Last time I did that though, I apparently deleted kernel32 or something like that and it just got so messed up I ended up reinstalling VS2010 ...
Otherwise I would have tried troubleshooting by myself first.
That being said, any help?