Sleep/Hibernate Problems

So, I have a computer I built myself specs being: AMD FX-8350, Gigabyte 990FXA-UD3, AMD Raedon 7900 HD Series, 4x4GB 1600MHz, and Windows 8. I don't feel as though listing the other parts are necessary. Anyways, my problem is that whenever I leave my computer idle it goes to sleep. Only problem is, if it's for a long amount of time I can't wake it back up. I have to not only turn off the computer, but instead unplug it and plug it back into the power. I hate having to do this. And I was wondering what the problem might be, or what I should do.

Hi there, and Welcome to the Eight Forums. . .

Have you created a "Custom Power Plan." If not then that is why your system is going to Sleep.

To Create a "Custom Power Plan" first right click your mouse on a open desktop then choose "Personalize." From the personalization screen go to the right hand corner of the screen, and choose "Screen Saver." Now from the "Screen Saver" screen choose the unlined "Change Power Settings." Finally just follow the instructions on the screen. . .Good luck