nonpaged area

Hey guys, First time poster on really any forum of any kind but I’m at a total loss here. To start off my PC randomly started crashing while playing games and any type of game. Sometimes it would be fine sometime I wouldn’t notice it for quite some time and then it would happen again. Well...

I just build my very first computer last night, and when I turned it on I got a code saying, " no keyboard detected" and "USB over current systems will shut down in 15 seconds" Any advice? Or ways to fix it?