Dell Optiplex 755

I have been setting up some Optiplex 755s and started to get machines which failed to install Windows XP. I had forgotten that you have to switch the SATA configuration from AHCI to IDE - the alternative would be to add SATA drivers during the install. Oh - and the machines had the BIOS locked and noone knows the password, so I had to remove the password jumper on the motherboard to get access!