my desktop is Dell Dimension 8400. I replaced the SATA with a new one (seagate). The computer recognised the HD in both BIOS and chkdisk. I partitioned it to 2 NTFS parts, and set the primary active (used PQMAGIC, a very old version back to year 2000). Then I run boot from CDROM, and windows setup showed "SETUP DID NOT FIND ANY HARD DISK INSTALLED IN YOUR COMPUTER. ... SETUP CANNOT CONTINUE, PRESS F3 TO QUIT SETUP". I don't know how many times I have got this message. Can anyone help me please. Thanks a lot.