Restarted computer during update; "the system network service is not compatible with this version"

Yesterday I upgraded my Ubuntu by SSH but before I finished it, I restarted my computer. I know that was not very smart. Anyway now I don't have internet connection, the WiFi or Ethernet is not recognized.

When I try on the latest version installed, the mice didn't work. When I try with previous version and go in gnome-network manager it's said:

The system network service is not compatible with this version

Another thing is when I comeback to the remote computer and look at the SSH terminal the process have stopped at:

Setting up desktop-file-utils (0.20-0ubuntu2) ... 
Configuration file `/etc/gnome/defaults.list' 
==> Modified (by you or by a script)
since installation. ==> Package distributor has shipped 
an updated version. What would you like to do about it ? 
Your options are: Y or I:install the package maintainer's 
version N or O : keep your currently-installed version D : 
show the differences between the versions Z : start a shell 
to examine the situation The default action is to keep your 
current version. * defaults.list (Y/I/N/O/D/Z) [default=N] ? 
Write failed: Broken pipe

Is there any simple solution other than I having to reinstall my system?

I faced the same issue. Workaround is to start the network-manager manually

sudo service network-manager start

Still trying to figure a way to fix it permanently.

Edit: This answer is over six years old and is no longer fresh due to changes in Ubuntu. This is a workaround.

Go into settings, startup items. Add an entry with the following command:

sudo service network-manager start

In a terminal, use visudo to add a NOPASSWD entry for this command so you do not need to give a password:

your-username-here ALL=NOPASSWD: service network-manager start

Next time you log on, this will force a start of the network manager (supposing that it is configured such that it can start up).

I had to reinstall the NetworkManager package and reboot. Everything was fine then.

sudo apt-get --reinstall install network-manager