A: I have a Lenovo brand, model T61 laptops, I want  load XP Pro on the my laptop, I figured that I would just insert an XP Pro CD in at boot and boot to disc and then reformat it and be on my way.  When I get to the part in the XP setup where you choose the drive partitions to delete/create, etc. the setup says "no hard drive was detected on your system".  I know the hard drive not failure.  I changed the boot order to boot to hard disk first, restarted and then Vista loads and I get onto the desktop with start menu and everything.  why install XP can get this message that No hard disks? 

Q: if your bios laptop don't have copatibility setting you can use this way...
1. Input the diskette contain sata ahci driver , Plug your usb floppy drive to your laptop (make sure that you have enabled the floppy in bios setting)
2.booting with win xp cd
3.press F6 for install scsi and raid hdd,when there is message press S to specify sata ahci driver,select sata AHCI 82801 mobile for 965 chipset or sata AHCI 9 mobile for intel 45 chipset.if your chipset is AMD you must use another AHCI (usually you can get it in XP cd drivers notebook or you can looking for in internet) and then press enter for continue.
4.usually would appear a message to use driver just select yes
5.it is done