W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/main/source/Sources 404 Not Found [IP: 91.189.91.14 80]

Problems:-

Err http://security.ubuntu.com utopic-security/main i386 Packages
  404  Not Found [IP: 91.189.91.14 80]
Err http://security.ubuntu.com utopic-security/restricted i386 Packages
  404  Not Found [IP: 91.189.91.14 80]
Err http://security.ubuntu.com utopic-security/universe i386 Packages
  404  Not Found [IP: 91.189.91.14 80]
Err http://security.ubuntu.com utopic-security/multiverse i386 Packages
  404  Not Found [IP: 91.189.91.14 80]
Ign http://in.archive.ubuntu.com utopic/main Translation-en_IN
Ign http://in.archive.ubuntu.com utopic/main Translation-en
Ign http://in.archive.ubuntu.com utopic/multiverse Translation-en_IN
Ign http://in.archive.ubuntu.com utopic/multiverse Translation-en
Ign http://in.archive.ubuntu.com utopic/restricted Translation-en_IN
Ign http://in.archive.ubuntu.com utopic/restricted Translation-en
Ign http://in.archive.ubuntu.com utopic/universe Translation-en_IN
Ign http://in.archive.ubuntu.com utopic/universe Translation-en
Ign http://in.archive.ubuntu.com utopic-updates/main Translation-en_IN
Ign http://in.archive.ubuntu.com utopic-updates/main Translation-en
Ign http://in.archive.ubuntu.com utopic-updates/multiverse Translation-en_IN
Ign http://in.archive.ubuntu.com utopic-updates/multiverse Translation-en
Ign http://in.archive.ubuntu.com utopic-updates/restricted Translation-en_IN
Ign http://in.archive.ubuntu.com utopic-updates/restricted Translation-en
Ign http://in.archive.ubuntu.com utopic-updates/universe Translation-en_IN
Ign http://in.archive.ubuntu.com utopic-updates/universe Translation-en
Ign http://in.archive.ubuntu.com utopic-backports/main Translation-en_IN
Ign http://in.archive.ubuntu.com utopic-backports/main Translation-en
Ign http://in.archive.ubuntu.com utopic-backports/multiverse Translation-en_IN
Ign http://in.archive.ubuntu.com utopic-backports/multiverse Translation-en
Ign http://in.archive.ubuntu.com utopic-backports/restricted Translation-en_IN
Ign http://in.archive.ubuntu.com utopic-backports/restricted Translation-en
Ign http://in.archive.ubuntu.com utopic-backports/universe Translation-en_IN
Ign http://in.archive.ubuntu.com utopic-backports/universe Translation-en
Err http://in.archive.ubuntu.com utopic/main Sources
  404  Not Found [IP: 91.189.91.14 80]
Err http://in.archive.ubuntu.com utopic/restricted Sources
  404  Not Found [IP: 91.189.91.14 80]
Err http://in.archive.ubuntu.com utopic/universe Sources
  404  Not Found [IP: 91.189.91.14 80]
Err http://in.archive.ubuntu.com utopic-backports/main Sources
Err http://in.archive.ubuntu.com utopic-backports/restricted amd64 Packages
  404  Not Found [IP: 91.189.91.14 80]
Err http://in.archive.ubuntu.com utopic-backports/universe amd64 Packages
  404  Not Found [IP: 91.189.91.14 80]
Fetched 116 kB in 3min 50s (500 B/s)
W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/main/source/Sources  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/restricted/source/Sources  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/universe/source/Sources  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/multiverse/source/Sources  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/main/binary-amd64/Packages  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/restricted/binary-amd64/Packages  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/main/source/Sources  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://security.ubuntu.com/ubuntu/dists/utopic-security/universe/binary-amd64/Packages  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/main/binary-i386/Packages  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/restricted/binary-i386/Packages  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/universe/binary-i386/Packages  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic/multiverse/binary-i386/Packages  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/main/source/Sources  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/restricted/source/Sources  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/universe/source/Sources  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/multiverse/source/Sources  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/main/binary-amd64/Packages  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/restricted/binary-amd64/Packages  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/universe/binary-amd64/Packages  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/multiverse/binary-amd64/Packages  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/main/binary-i386/Packages  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/restricted/binary-i386/Packages  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/universe/binary-i386/Packages  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-updates/multiverse/binary-i386/Packages  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/main/source/Sources  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/restricted/source/Sources  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/universe/source/Sources  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/multiverse/source/Sources  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/main/binary-amd64/Packages  404  Not Found [IP: 91.189.91.14 80]

W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/restricted/binary-amd64/Packages  404  Not Found [IP: 91.189.91.14 80]
W: Failed to fetch http://in.archive.ubuntu.com/ubuntu/dists/utopic-backports/multiverse/binary-i386/Packages  404  Not Found [IP: 91.189.91.14 80]

E: Some index files failed to download. They have been ignored, or old ones used instead.
sandeep@sandeep-HP-Pavilion-g6-Notebook-PC:~/Videos/java_inter/ADV$ 

Solution
Open a terminal (CTRL+ALT+T) and issue the following commands in order
sudo cp /etc/apt/sources.list ~/

sudo wget "http://pastebin.com/raw.php?i=uzhrtg5M" -O /etc/apt/sources.list 

sudo apt-get updatesudo rm /etc/apt/sources.list.d/ubuntu-extras.list


sudo apt-get update
W: Duplicate sources.list entry
This solution is not general. It is specific to the sources.list file of the Original Poster.

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