On an XP Pro Dell Optiplex, I sometimes -- only sometimes -- get the bios messege "Primary hard drive 1 not found" etc. This usually happens on restart. Sometimes this happens after I have plugged in and removed a sandisk flash drive to a USB extension cord. Sometimes it happens troubleshooting other device problems. The possibilites: although I have not played with the HD cables at all, one of them may be lose and on checking I missed it; the machine I'm using I inherited, reformatted, reinstalled XP, updated all drives including the flash bios. Somewhere along the line the bios settings might have been...what...corrupted. But none of the above makes sense because, as far as I recall, I never get the messege on bootup. Only on restart. I don't get it. Any help would be greatly appreciated.