Password for root

When I try to make any kind of changes on my system, I keep getting ask for the password for root, when I input what I thought is the correct word, the window shakes 3 times and closes and will not allow me to upgrade add another user etc..........

Sudo

Ubuntu does not give you access to root by default. It uses sudo/gksudo/kdesudo instead. This gives you temporary SuperUserDo rights. Have a look at http://psychocats.net/ubuntu/graphicalsudo

How exactly are you trying to make changes to your system?

Connect to the Internet. Open a Terminal.Try:
sudo apt-get update

Does that work?

Password for Root

Thanks for your reply, I will answer your questions and try what you have suggested and get back with you on the results later today, I am at work and the computer is at home.........once again thanks so much for your time

shupau
semper-fi