Okay, I have Ubuntu version 11.10 and I wish to upgrade to 12.04. Whenever I open the Update Manager and click "Check," it has taken literally over an hour to download the cache. I cannot update without checking the cache; attempts in the console (as suggested here) have failed. What do I do in order to update without waiting over three hours to download the entire cache? Or how do I get it to download quicker? EDIT: Saw this page, it provided no help. Just false hope. Oh, and no, my internet works just fine; normally I have a 600kb/s download rate. No dial-up here.
I tried again later and it worked. So it solved itself. I think it was probably just my internet having a hiccup, but only to this computer. Which is weird.