Whenever i just jerk my computer with a nudge it just restarts...what could be wrong?

hmm? can you say things in more details way? heheh. sorry.

the power supply isnt hooked up right? i would suggest opening the case and see if everything is pluggin in right..

Maybe the cables connecting the restart button are kinda loose and close together so when you move it they touch and create a closed connection and restart the comp, or it could be the PS as stated above.

check all the cables. and all of above if that doesn't work kick it a couple times it always helps

check the plugs, usually the electric plug is barely stuck in far enough that everytime the thing moves it restart/turns off etc..

might be sumfin with the the cables or wiring.... i doubt its the power supply coz it would turn off completely