Woke up this morning, and as usually I had new software to download and install through updater on Ubuntu 10.04. So I click install updates and about halfway through updating it stops. No apparent reason, but the windows is frozen and cannot be closed.
After a quick search on the Ubuntu forums and a look at man apt-get, there appears to be a fix.
sudo apt-get install --fix-broken
I also remember that another time I had a problem with missing dependencies. The fix for this is also very similar.
sudo apt-get install --fix-missing
If you are having problems with the apt-get command, for what ever reason, the first place you should go, even before google, is running the following code in the terminal
This particular manual page is extensive, with many solutions for just about in problem. Add a comment if you have any questions or problems.