The other night for no reason an Alarm wnet off on my Computer my Mother turned the Computer off i was not home.When i came back and rebooted it went off again.I pressed the reset button it went off but then when i rebooted it went off again.I have Windows XP Pro.I have lots of Hard drive space plus memory and my cooling fans are ok and a good hard drive. Thank You Sincerly Joan Hall.Ps i have changed no settings at all