Looking at the error message you posted and your Pastebin, the problem lies in lines 60-63 of your
Your incorrect sources look like this:
deb http://archive.canonical.com/ partner
deb-src http://archive.canonical.com/ partner
deb http://archieve.canonical.com/ partner
deb-src http://archieve.canonical.com/ partner
While they should look like this instead:
deb http://archive.canonical.com/ubuntu precise partner
deb-src http://archive.canonical.com/ubuntu precise partner
I have removed the other two lines of the partner repository because it was a duplication.
Please press Alt+F2 and type
gksudo gedit /etc/apt/sources.list
Then edit your sources so they look the same as I have noted above and then save and exit
sudo apt-get update
should be successful.