When I hit control, alt, delete my keyboard and my touch pad mouse on my laptop stops working. I can't log into my PC. Dell inspiron notebook running xp. However, I can use my touch pad on the boot screen where the system prompts you hit contol, alt, delete. If I hit f2 while booting, I can use my keyboard.

Sounds like you're connecting to a domain, is this correct?

When you hit CTRL+ALT+DEL does the prompt go away and bring you to the login screen?