I installed a wubi on my optiplex gx 620 recently on top of a windows xp. But after using it for about two weeks, I notice that the software update can never be carried out again. Every time I log in the system reminds me to do updates, but when I press the update button it flashes out a temporary message box (for about half a second) saying there is some authentication error (I can't get the complete message since it's too fast). This didn't bother me too much until today when I want to install foreign language support. The same flash message box appeared again and the installation cannot be done. After waiting for about 5 minutes a message box pops out saying "time out most likely the daemon died". I can give more details but I thought this might be a generic problem with wubi installation?
updates: after following the advice of fossfreedom, I think the upgrading is up and running! Before I only typed in sudo apt-get update, but I guess it's important to do upgrade as well! Thanks a lot!
My only lingering concern is how to do this upgrading automatically outside terminal. It seems there should be a way to enter password in a GUI? It would also be nice because sometimes I don't know the name of a particular software (like a language package) so it's easier to just upgrade in a GUI.