Using a standard computer to mine BTC just will not work.
You will get a little but one year old 333 MHz usb stick will beat your computer chances are if your mining BTC. For most Scrypt is dead with GPU there are a few who have it left, do roi math but most likely mining with regular computer is not going to happen.
I have the same problem, but I have 4 Antminers U1 and the hashrate of them is 4,6GH/s. I have now 5000 blocks, but on the bitminter website on my balance is nothing, there are no bitcoins???
I would really apreciate it if someone could help me!