Hi! I'm new to pc gaming so please don't roast for not knowing some things. But I bought a NZXT pc. It has an AMD Ryzen 5 2600, RTX 2060, MSI B450 Tomahawk, Seasonic S12II 620W Bronze, Cryorig Cooling fan, Intel 660p 512GB SSD. Now I recently just got back from a week vacation. And before I left, my PC ran perfectly. No restarting/shut offs. But, since I have been back, it only likes to run Overwatch. I'm a Fortnite player and it will play Fortnite for a good 20 minutes before restarting. And what's weird, is the lights and the fans don't turn off. So I don't believe it's a power issue. And there is a good chance that it's not overheating either. What would make my PC just randomly start doing this? Help?