While starting up, the computer shows a screen where you can press del to enter BIOS setup F12 for flash recovery etc and below it makes a list of all the drives in the system (Ide master,slave...) and the ram size.Thats the point where the pc freezes and nothing else happens.after the list is done usually a beep follows and another quik screen and then windows boot from the hard drive.
Ive discovered that sometimes holding the power button until the pc shuts down and the immediately powering up again,can fix the situation.but that works at 1% of the cases.|Sometimes unplugging for 2 hours fixes the problem.
The hard drive is new,one month old, maybe agp doesnt connect properly?
Cpu temp=59C/138F
System temp=41C/105F
more can be found in the pictures.
http://img3.imageshack.us/gal.php?g=bios2.jpg