Computer freezing randomly - Windows 8.1

MyBurger_

Reputable
Jun 11, 2014
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So I built a new PC for my sister. AMD 860, R9 290X, ASRock FM2A88X, 8GB RAM, and Windows 8.1. It's freezing randomly, and we don't know why. She says it can work for only minutes until it freezes, but other days it'll work for hours. We've re-installed the OS, and that's about it. Anyone know how to fix it? It's super broad, but I'll give as many answers as I can.
 

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