Bill, I should have mentioned that you see nothing with fdisk /mbr. It just goes back to the A prompt. Now we have "missing operating system". When will these error messages cease? Everything look OK in the BIOS? If only you had Partition Magic. This error message is usually due to the OS not being set Active and PM would tell you if this was the case. http://www.terabyteunlimited.com/kb/article.php?id=270 Bill, we are just chasing one error after another. Would you like to try it my way? Start again from Windows and make an image of the C drive partition, (not the whole drive) writing it to the external HD. Install the SATA HD and delete all partitions. Then create a Primary partition on the SATA HD, say 70 GB as a test, NTFS (quick format). Remove the Seagate. Then restore to this partition as we have discussed. Don't worry about the MBR as the SATA HD already has a generic MBR which isn't deleted by deleting the partitions. If it boots with the hal.dll error you are looking good. Then use editBINI.