after hardy upgrade can't add updates or new programs

[tiana]

If I try to add a program using add/remove programs it sort of freezes. It lets me minimize and maximize the window but it won't let me close it and I have to restart the computer if I want the non-working window to go away.

Also there are two updates that I have been trying to implement but once I hit the button to download them it does the same thing as with the program. It freezes and I can't download anything.

[tamoneya]

try doing it through command line.
Update:
sudo apt-get update
sudo apt-get upgrade

Install:

sudo apt-get install <package name>

[tiana]

It tells me "unable to resolve host laptop"

[plucky]

Can you post the output of
cat /etc/hosts and
uname -a