take note that in task manager, I disabled the mouse and keyboard accidentally that's the reason why mouse and keyboard are out of service. I tried F8, F2 and F12 and won't work.
You can force XP to go into Safemode by letting it boot and before it has finished loading (i.e. you see the green horizontal bar) turn the power off. XP will know it did not boot last time and go into safemode.