Newbie help

I am new to Arduino. I have bought my 10 year old a mbot. We have put it together correctly. It worked for a small period with the remote but now it is just flashing and I cannot connect it to my computer with the 2.4G Wireless serial or with the cord. I downloaded all the program and drivers correctly (I am pretty sure). I tried reseting it to factory settings but cannot connect it so I cannot do that either. Can you please help me? What do I do to fix this?

I am unfamiliar with your setup but when you plug in the "cord" which I am assuming it's USB, do you get error messages? What does it list in the device manager?