[ubuntu] After updating from 9.10 to 10.4 I cannot update anything?

Ok so I was using 9.10 because of my wifi not working in 10.4 (still does not but thats not the problem in this thread) well after getting my updates to update to 10.4 I run the package manager to update kernals and such, first it says theres an error failed to fetch CD then I reset my computer and...