I've made the BIOS to default. and I've tried with my CDRW drive unplugged. I even unplugged my other DVD drive, but i still have the problem. But when i did it with the drives unplugged, the blue screen came on later than when i had the drives plugged. I don't have the windows CD with me. I'll try to find another one. and thank you for your help! Please inform me if you have other suggestions.