"Disk boot failure insert system disc" every time i get up I have done a format c and installed windows xp again. My pc worked just fine a whole day long and i could restart the pc without problems. The next morning i want to boot my pc and i get the message "System boot failure please insert system disk" I couldn't get it fixed so i reinstalled my pc again. I worked with my pc the whole day without any problem i went to bed. The next day i had the same problem as the day before "System boot failure insert system disk". Now my question is how it comes that i cane resart and boot my pc a whole day long and if it is turned off for 8 hours that i get the message "system boot error..." anyone a suggestion?