Ok so built my pc about a year ago my motherboard is a z370 gaming plus I had this problem probably 5 months from when I built it I got a error message on startup power surge on USB port shutting down in 15 seconds to protect The motherboard. I turn my pc off unplugged my mouse/keyboard plugged it in booted up everything worked fine works for about a month it gives me the same error. I try unplugging and plugging my mouse and keyboard again does not work, try about 5 more times of reststarting my pc unplugging plugging back in etc. Then I gave up, came back the next day didn’t work came back the day after that every thing is working fine. Now this time it has been 2 weeks but it’s really weird if I have something plugged into the front the error message pops up and no lights come on for whatever is plugged into the front but the lights and keystrokes register for whatever is in the back and vice-versa with the mouse. And if I have nothing plugged in the computer it boots up just fine. I know this is a really weird case and I don’t have much money so I’m really hoping you guys could help me find out the problem and fix it.