Upon initial boot, everything is very slow to respond. Eventually, the desktop appears, but then a high-low tone is heard, then a low- high tone is heard. A few seconds later, another high-low tone and then a shorter pause before hearing the next low-high tone. The pause between the two tone combinations gets shorter and shorter, until the screen goes black and either shuts down the computer OR brings up a BSOD. Because of the decreasing amount of time, I am unable to do anything to stop it from reaching the endpoint of its behavior. Please help me get rid of this!