Well, this is a question for Compaq guys. Did you contact them ? Sounds like the keyboard or internal ribbon has some contact problems.
As for the Ctrl Alt Del combo, is your PC connected to a domain or standalone ? In either cases, there is a policy in order to restrict the Ctrl Alt Del at logon that is named:
Disable CTRL+ALT+DEL requirement for logon
Trying to unweave, unwind, unravel
And piece together the past and the future,
T. S. Eliot
Can anyone tell me how to correct a problem I'm having with my taskbar & desktop. I went into display properties and changed my icon title blocks to be white with black words, originally they were blue with white words, then saved it as a scheme. However it boots up like I changed than after a couple minutes it flashes & changes back to the original color. More recently now my task bar has started turning black & I must turn off and restart to correct.