Reading package lists... Done
W: GPG error: http://downloads.sourceforge.net all InRelease: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY CCC158AFC1289A29


Do you want to continue [Y/n]? Y
dpkg: warning: parsing file '/var/lib/dpkg/available' near line 35061 package 'gwizard.56bbed34ae4ebf4b3593056f8e0b8ea604a1db20. 1':
error in Version string 'v1': version number does not start with digit
(Reading database ... 637518 files and directories currently installed.)
Preparing to replace cinnamon 1.6.3-0ubuntu1~precise1 (using .../cinnamon_1.6.4-0ubuntu1~precise1_i386.deb) ...

Using: Ubuntu 12.04
AMD Dual-core 3800, 2GB RAM