Sorry, Ubuntu 15.10 has experienced an internal error.

Sorry, Ubuntu 15.10 has experienced an inteal error.

That is the error message whenever I log into the Ubuntu PC I just installed. I'd paste the text of the error here, but the window that displays the message does not cut-and-past.

So, what do I do?

It tells me to upgrade a list of packages which is 1000 characters long. But I can't cut and paste the list into a window? What do the Ubuntu developers expect me to do? Type every package into the command line? And, why do I have to upgrade packages if I just did a fresh install? (yes, I already did apt-get update).