Sorry if this is in the wrong bit. I have just finished my first build in a good while. If i plug something like a usb hard drive or speakers into my sound card when the computer is off, all is good but if I try plugging anything into the usb ports at the front of my case or anything and even if I slightly graze something that is plugged into my computer it just restarts for some reason. Can anyone give me some advice on how to fix it