BSOD in windows xp even in command line mode

"It seems highly likely some part of your hardware has failed.

Best case, one of your RAM sticks is gone, but you have more in there. Worst case, your CPU or entire motherboard has blown.

First thing I'd do is see if it works without one of the sticks of RAM inside, just swap each one out in turn and see if it gets better if you have more than 2."