At the time when Bitcoin was just launched one could mine Bitcoin with just one computer without any tools, but now every computer will need other equipment or a mining rig consisting of many graphics processing cards (GPU), and you will need 1,850 kilo Watts of electricity per hour , (note the electricity tariff in your country), to mine 1BTC . Solo mining or mining Bitcoin alone you also have to provide many advanced tools such as PC, motherboard, graphics card, hard drive, RAM, ASIC hardware, Bitcoin miner software etc. Solo mining is generally only done by expert miners, because it will be difficult for beginners. It's better for you to join a group or pool of miners, so that they work together to break one block, and share the mining results. Without joining a bitcoin miner association, you can actually mine bitcoin yourself. However, for a year of mining bitcoins, you may not get anything because you can't solve the problem.