I've been experiencing worst computer problems in my life.. i pulled most of my hair out..

I use ECS 4S400-A motherboard with 3.0 pen4 processor..

1. i had a problem where i would be able to shut my computer off, and after a while it turns itself on and wouldn't respond to any buttons. I pulled the plug, waited couple hours, and as soon as i plug my power in, my computer starts..
- i reset my bios, (pins AND battery) and it still didn't work
- i pulled out my switch pins, and it still turns itself on
- i tried my 2nd PSU, it didn't work except make a strange noise. I am guessing it broke

now im so lost, confused, and in verge of mental breakdown..

now i can't access my bios menu because my computer won't shut off!

Read this: http://support.microsoft.com/?kbid=308029 could be one of many things.