I have been using Windows XP running computer. The computer is supported by Asus p8z68-v pro motherboard. From the last 1 week I have noticed that my system is showing issues when I am starting it. Actually the problem is that whenever I am starting my computer, it will start normally until it reaches the BIOS screen. Here the system will shut down for some 2-3 seconds and then restart normally like nothing happened. Can anyone tell me what might be causing the issue with my device? Please help me.