There's so much good stuff in the world. Good things that can distract you from bad things. I have found in my life that distraction is the best way to fight off depression. Stay busy and active, switching between different things that you enjoy.
Just last week, I went with a friend to walk 10 miles around a lake in the mountains. Although the depression was always there in the background, I was happy. The key is distracting yourself from it.

CPU: Intel Core2 Quad Q9650 3GHz
RAM: 6GB DDR2
GPU: NVidia GeForce GT1030
Monitor: An LG 32in TV I got for free ages ago
Printer: Samsung ML-1210 from 2002
Keyboard: An old PS2 one I nicked from my aunt