i am having a windows XP OS on Intel dual core processor,512 MB RAM. when I try to boot the system it enters the very first screen where intel logo and a message "press f2 to enter bios setup" and hangs thereafter, after pressing F2 also it shows the same screen,no keys work and processor activity LED also remains constant. I suspected on CMOS battery, once i removed CMOS battery and re inserted, it booted up. and again same problem in another boot.. what is the solution?