How to change my legacy bios in Windows Vista to support PS/2?

I'm trying to hook up a PS/2 keyboard to my new computer using a USB adapter. I've tried two keyboards and two adapters and neither one works. When I asked about this before, someone said I needed to change my bios settings. Can someone walk me through this? I know a little about computers but don't want to screw anything up! Thanks!How to change my legacy bios in Windows Vista to support PS/2?sounds to me like your ps/2 connect is mess up. also, your usb keyboard might not support ps/2 adapter. check with your keyboard for further specs.