My kids have a Dell Dimension 3000 computer that had a WD Caviar SE Enhanced IDE Hard Drive with 160GB'S.One morning after a bad storm when the computer was turned on it just had a black screen and said no drives found.I was told i needed a new hard drive.I am no computer whiz but thought maybe i would try to put a new hard drive in myself.I purchased a Seagate Barracuda 7200.8 - Hard drive - 250 GB - internal - 3.5" - ATA-100 - 7200 rpm - buffer: 8 MB Seagate 250 GB UDMA/100 IDE Hard Disk Drive .I was told this would work.I just took the old one out and put the new Seagate one in. I thought it was as simple as that.Now when i turn on the computer the screen is black and say's Strike F1 to try reboot and Strike F2 for set up utility.When i try to install XP operating system, it goes as far as Hardware abstraction and then it comes up and say's File\i386\halaacpi.dll could not be loaded.Error code 7. Setup cannot continue.When i go ti Bios the drive configuration say's Primary Master drive.........off.Only other option is N/A Primary Slave Drive.........Off.Other option N/A.Secondary Master drive.........CD-ROM Device SECONDARY Slave drive......ATAPI Device and IDE Drive UDMA........ON. Please Help! Thanks.