Apparently, this problem is common to Acer. I hate that the NumLock key turns off after resuming from sleep or hibernation. I finally decided the Acer in their (lack of) wisdom does not provide any means to override this and the only way is to use a program to turn it on after resuming. I found a program called traystatus but what I need to make it work is to tie it to whatever program or driver that runs only after sleep resumes.
Does anyone know any program that runs when the computer resumes from sleep mode?