Hi there

I can't upgrade to ubuntu 7.10 by the alternative cd 7.10.

There are errors that I get

Failed to fetch cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016.1)]/pool/main/z/zlib/zlib1g_1.2.3.3.dfsg-5ubuntu2_i386.deb MD5Sum mismatch
Failed to fetch cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016.1)]/pool/main/p/perl/perl-modules_5.8.8-7ubuntu3_all.deb MD5Sum mismatch
Failed to fetch cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016.1)]/pool/main/p/perl/perl_5.8.8-7ubuntu3_i386.deb MD5Sum mismatch
Failed to fetch cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016.1)]/pool/main/libt/libthai/libthai-data_0.1.9-1_all.deb MD5Sum mismatch
Failed to fetch cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016.1)]/pool/main/libt/libthai/libthai0_0.1.9-1_i386.deb MD5Sum mismatch
Failed to fetch cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016.1)]/pool/main/x/xft/libxft2_2.1.12-2ubuntu4_i386.deb MD5Sum mismatch
Failed to fetch cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016.1)]/pool/main/p/pango1.0/libpango1.0-0_1.18.2-0ubuntu1_i386.deb MD5Sum mismatch
Failed to fetch cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016.1)]/pool/main/s/scim/libscim8c2a_1.4.7-1ubuntu2_i386.deb MD5Sum mismatch
Failed to fetch cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016.1)]/pool/main/libx/libxcomposite/libxcomposite1_0.4.0-0ubuntu1_i386.deb MD5Sum mismatch

.......


Failed to fetch cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016.1)]/pool/main/t/ttf-indic-fonts/ttf-malayalam-fonts_0.5.0-0ubuntu1_all.deb MD5Sum mismatch
Failed to fetch cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016.1)]/pool/main/t/thaifonts-scalable/ttf-thai-tlwg_0.4.7-1_all.deb MD5Sum mismatch
Failed to fetch cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016.1)]/pool/main/t/ttf-unfonts/ttf-unfonts-core_1.0.1-6ubuntu1_all.deb MD5Sum mismatch
Failed to fetch cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016.1)]/pool/main/u/ubufox/ubufox_0.4~beta1-0ubuntu3_all.deb MD5Sum mismatch
Failed to fetch cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016.1)]/pool/main/x/xresprobe/xresprobe_0.4.24ubuntu8_i386.deb MD5Sum mismatch
Failed to fetch cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016.1)]/pool/main/x/xsane/xsane_0.99+0.991-3ubuntu5_i386.deb MD5Sum mismatch
Failed to fetch cdrom:[Ubuntu 7.10 _Gutsy Gibbon_ - Release i386 (20071016.1)]/pool/main/x/xsane/xsane-common_0.99+0.991-3ubuntu5_all.deb MD5Sum mismatch

Many thanks

As far as I can tell 7.04 and 7.10 are no longer supported. Online upgrades will not work. An alternative would be an upgrade to a newer version, such as 8.04 (Long Term Release) or on up to 9.04. Several months ago I experianced much the same on an older laptop with Dapper Drake and went ahead and installed 9.04 after a data backup. I could be wrong but it might be your best option.
I like the newer version because of all the new features.
Regards