Blue screen problem

Hello,
Just bought a new computer about 2 months ago never had problem with it untill i tried importing my videos with my video camera using a usb cable, all i can remember that there was a pop up cant remember what it was but i clicked OK anyway, then after that my computer restarted by itseft, but i keep getting the black screen saying about having error on
A recent hardware or software changed must of cause this and it keep counting before trying to start the windows, i can see the windows sign tried to open up but the blue screen flashed once then back to that black screen again with a counter and an error message about A recent hardware then it keep doing the same thing and wont stop untill i switch my computer off. please help me. Thanks