Just a quick update. I was able to borrow a proper Dell USB keyboard and all back to normal now! Once again, thanks for your help.
My problem is with an old Dimension 9150/XPS400 machine. I can enter either the Setup or Boot menus but cannot successfully navigate while in theses menus. Problem is Up/Down and the Left/Right arrow keys move the highlighted field so fast that I cannot control it! Any suggestions please?
Cannot navigate the boot menu