CPU and GPU mining for Bitcoin is dead. You will never make anything but will ruin your machine in the process. You need an ASIC miner. The newer the better.
Still looking for an answer here.
Quite the adamant one we have here. I bid you listen to the ones before me.
bitcoind and bitcoin.exe are the same afaik, except the latter has a GUI. I have no idea why you'd want to use guiminer, though.
If you're that persistent, i'd say just use something like minergate, lmao.