As i dont pay my own electricity, i cant go - on mining bitcoins, but until i buy ASIC, what do you recommend doing with 100mhas/s
0.1 Gh/s will make you about 3 dollarcent a year, while ruining your computer.
Like it has been asked before, it would be a good thing to give us the complete picture to work with
- is your electricity really free
- how much electricity can you use (it's not because it's free that you can use as much as you want... Your landlord might knock down your door, or your house might catch fire if your breakers aren't ok)
- what kind of PC do you have (let's find out if you can mine some CPU minable coins, don't expect to much tough)
- what kind of GPU is inside your PC
- do you have a budget you can spend
- which commandline were you executing when starting the OP?
- what is your technical knowledge?