I can't install gedit. Can somone help?

Hi,
So I've looked every where and still can't find the gedit software in my computer. I believe my operating system is Debian GNU/Linux 7.11 (wheezy).

I went into Synaptic Package Manager and found gedit (ver 3.4.2-1) and gedit-common (ver 3.4.2-1) and tried to install those. Then my computer gave me this error:
W: Failed to fetch http.debian.net/debian/pool/main/c/cogl/...l9_1.10.2-7_i386.deb
404 Not Found [IP: 2a04:4e42:3f::204 80]

I've also tried running the command:
sudo apt-get update
sudo apt-get install gedit

It also comes up with error:
Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?

Can someone point me what to do to solve this issue?

Hi John,

I just updated my synaptic package manager sources by following your link.
When I re-opened my synaptic package manager and entered my password, I get an error message:

All I did was manually added the archive repositories and disable the ones already in there. Not sure where I messed up.

if you put the File /etc/apt/source.list here
we can get it right for you
or go here to see more help
forum.linuxcnc.org/29-forum-announcement...-wheezy-repositories

Is this what you need? This is my first time trying to search for it ...

It looks like I was not supposed to add the additional archive sources. But rather just edit the base and security URIs per the instruction.

So I went back, removed the archive sources that I manually added. Then edited the existing base and security URIs.
I edited the URI and Distribution blocks. Now they look the same as the screenshot shown in Andy's post.

Here's mine after the edit:


Then I run the command sudo apt-get update -o Acquire::Check-Valid-Until=false
I get some "Failed to fetch ... " errors and I don't know if that is normal or not. Here's a screenshot of that:


I am now able to install gedit though: