Xbox 360 problem..Keeps crashing..Help?

Does it have red rings? If so it's probably overheating. If not, check all the wires and make sure they are plugged into the right places. If all seems to be legit. Try not to move it around too much. If all of this results the same. I'd suggest sending it to Microsoft, you should have a free repair, if not, it's like 50-120 dollars to fix it...