Last winter I built my own computer. I had to try to install windows 8.1 like three times because something was mess up. It eventually worked. Every time I turn my pc on it has a 50% chance to boot normally. The other 50%, my computer blacks out. The screen is the solid color of my windows color. I can either wait 20 minutes for it to fix itself or press the reset button. It still happens when I installed windows 10. Also when I put my pc on sleep it sometimes freezes up. I can use my mouse to press the restart button and it will take a minute to reboot. What is the problem? Should I replace some parts or look inside? Thanks