cannot get or remove programs from the software center

I go to the softw C, I enter installed software, for instance I want to remove an installed package, I click it, nothing happens, no authentication pops up...

when going to the Kpackagekit, it replies : cannot get lock with these details

W: GPG error: http://security.ubuntu.com maverick-security Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <email address hidden><br />E: Error http://ppa.launchpad.net maverick/main Sources<br /> 404 Not Found<br />

sudo apt-key adv --recv-key --keyserver keyserver.ubuntu.com 40976EAF437D05B5

Will fix that, you have added a ppa but not added the key

hallo mr mrs actionparsnip, I did just what you told me, but the thing is not resolved, I can still contact to Software Cantre, but not remove or install, clicking there does not give any reaction, in the Kpackage, the reply is shorter and now says :you have failed to provide correct authentication please check any passwords or account settings..... and going to the detail only says now : failed to obtain authentication,

thank you so much
piet

What about if you run:

sudo apt-get update; sudo apt-get -y upgrade

What is output?

Hallo Mr Mrs

When running the first command I get lots ending with :

W: Failed to fetch http://ppa.launchpad.net/webupd8team/rhythmbox/ubuntu/dists/maverick/main/source/Sources.gz 404 Not Found

W: Failed to fetch http://ppa.launchpad.net/webupd8team/rhythmbox/ubuntu/dists/maverick/main/binary-i386/Packages.gz 404 Not Found

E: Some index files failed to download, they have been ignored, or old ones used instead.

After running the second command you gave me I get :

piet@piet-laptop:~$ sudo apt-get -y upgrade
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
piet@piet-laptop:~$

Another help from your side would be great,
Piet Vietnam

ok then that PPA does not have a maverick PPA and should be removed via software centre. This may help.

and how do I do this, I mean this removing of the maverick PPA ( or is it adding ?)
thnx again

"removed via software centre"

......Not clear?

Hallo,

No, not clear, I may be speaking seven languages but this is not clear, if it is removed by SC, why, en how do can I get access again to the centre,

Can you give the content of:

gedit /etc/apt/sources.list

Thanks

that is quick, may I ask you where you are ? nice world, well, this is the outcome, thx

# deb cdrom:[Ubuntu 10.04.1 LTS _Lucid Lynx_ - Release i386 (20100816.1)]/ lucid main restricted
# See http://help.ubuntu.com/community/UpgradeNotes for how to upgrade to
# newer versions of the distribution.

## Major bug fix updates produced after the final release of the
## distribution.

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team. Also, please note that software in universe WILL NOT receive any
## review or updates from the Ubuntu security team.

## N.B. software from this repository is ENTIRELY UNSUPPORTED by the Ubuntu
## team, and may not be under a free licence. Please satisfy yourself as to
## your rights to use the software. Also, please note that software in
## multiverse WILL NOT receive any review or updates from the Ubuntu
## security team.

## Uncomment the following two lines to add software from the 'backports'
## repository.
## N.B. software from this repository may not have been tested as
## extensively as that contained in the main release, although it includes
## newer versions of some applications which may provide useful features.
## Also, please note that software in backports WILL NOT receive any review
## or updates from the Ubuntu security team.
# deb http://us.archive.ubuntu.com/ubuntu/ lucid-backports main restricted universe multiverse
# deb-src http://us.archive.ubuntu.com/ubuntu/ lucid-backports main restricted universe multiverse

## Uncomment the following two lines to add software from Canonical's
## 'partner' repository.
## This software is not part of Ubuntu, but is offered by Canonical and the
## respective vendors as a service to Ubuntu users.

deb http://tw.archive.ubuntu.com/ubuntu/ maverick main restricted universe multiverse
deb-src http://tw.archive.ubuntu.com/ubuntu/ maverick main restricted universe multiverse #Added by software-properties
deb http://security.ubuntu.com/ubuntu/ maverick-security main restricted universe multiverse
deb-src http://security.ubuntu.com/ubuntu/ maverick-security main restricted universe multiverse #Added by software-properties
deb http://tw.archive.ubuntu.com/ubuntu/ maverick-updates main restricted universe multiverse
deb-src http://tw.archive.ubuntu.com/ubuntu/ maverick-updates main restricted universe multiverse #Added by software-properties

deb http://extras.ubuntu.com/ubuntu maverick main #Third party developers repository
deb http://download.skype.com/linux/repos/debian/ stable non-free

OK it's not in there but this should do it:

sudo ppa-purge ppa:webupd8team/rhythmbox; sudo apt-get update; sudo apt-get upgrade

Should remove it

hallo, done all that, but the result remains unchanged,
when I try Softw C or Kpackage - I still can't get anything or remove anything
outcome in terminal ends like this :

W: Failed to fetch http://ppa.launchpad.net/webupd8team/rhythmbox/ubuntu/dists/maverick/main/binary-i386/Packages.gz 404 Not Found

E: Some index files failed to download, they have been ignored, or old ones used instead.
Reading package lists... Done
Building dependency tree
Reading state information... Done
0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded.
piet@piet-laptop:~$

connecting to the programs through Softw Centre or Kpackage is possible, but getting programs or removing programs is not, I'm not asked to provide a key and in the Kpackage response I get :
failed to get authentication - where should I start to solve this ? - and as a second question I was wondering if I could not better just reinstall 10.10 altogether and if so how should I be doing this ?

can anyone help me with this ? I'M STILL ON ABOUT THE SAME QUESTION, when I go to the upgrade Manager I get the following, so something is badly wrong

W:GPG error: http://tw.archive.ubuntu.com maverick-updates Release: The following signatures were invalid: BADSIG 40976EAF437D05B5 Ubuntu Archive Automatic Signing Key <email address hidden>, W:Failed to fetch http://ppa.launchpad.net/webupd8team/rhythmbox/ubuntu/dists/maverick/main/source/Sources.gz 404 Not Found
, W:Failed to fetch http://ppa.launchpad.net/webupd8team/rhythmbox/ubuntu/dists/maverick/main/binary-i386/Packages.gz 404 Not Found
, E:Some index files failed to download, they have been ignored, or old ones used instead.

perhaps I could just reinstall my whole 10.10 and if so, how do I do it from the net

Thanks actionparsnip, that solved my question.