Distribution upgrade can't install 'ubuntu-desktop'

[Dejan Petrovic]

Binary package hint: ubuntu-desktop

1)9.10 - the Karmic Koala
2)0.62.5
3)update to 10.04
4)not all update could be installed.
Update manager is offering me partial upgrade...
And then big ERRmsg (Can't install 'ubuntu-desktop')
Package menager reports 1 broken package. It's ubuntu-desktop.
When I try reinstalling it...
E: Unable to correct problems, you have held broken packages.
E: Unable to lock the download directory

ProblemType: Bug
Architecture: i386
Date: Fri Apr 30 12:24:14 2010
DistroRelease: Ubuntu 10.04
InstallationMedia: Ubuntu 9.10 "Karmic Koala" - Release i386 (20091028.5)
NonfreeKernelModules: wl
Package: ubuntu-desktop 1.177
ProcEnviron:
 LANGUAGE=en_US.UTF-8
 PATH=(custom, no user)
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.32-6.8-generic
SourcePackage: ubuntu-meta
Tags: lucid
Uname: Linux 2.6.32-6-generic i686

[Bryan Quigley (bryanquigley)]

Thank you for reporting this bug to Ubuntu. Ubuntu 10.04 reached EOL.
See this document for currently supported Ubuntu releases: https://wiki.ubuntu.com/Releases

If the bug is still reproducible on a current release, please do reopen it.