hi there, if you want lock your computer you can use windows logo + L Else if you want change your password you can right click
on my computer then go to manage>>users... right click on
your account >> reset password Else if you want yo logoff or shut down i think you know this Else if you want to open task manager then press CTRL+SHIFT+Esc Else fix your keyboard End if.
LOL.....alans, that is the COOOLEST way to write :-D ("Else if")
back to the topic...
As far as how to login when you are presented with the Alt+ctrl+del screen, i think if you enable windows accessibility (onscreen keyboard), you would have a method to hit ACD, but i dont think u can change the the keys used because there's security behind the reason why only ACD can be used.
You can also disable the request for ACD when you login, just to add more thought to this.