My computer crashes randomly here lately and i cannot, for the life of me figure out what is causing the crashes... no blue screen just a long buzzing sound of whatever i am watching or listening to at the time or just a computer freeze when nothing is happening on the computer. I am not sure what to do and would VERY much appreciate the help in figuring this out. i am pretty sure it is not my graphics card. i have a very good graphics card but i am thinking it may be the power source. how do i find logs and such to figure this out? thanks in advance.