Says either CD/DVD has got problems or HDD is old/etc.
Sum-check the ISO:
$ md5sum trisquel_7.0_amd64.iso
It should be ef6b33d2959dbbb6016188868975091f according to
http://cdimage.trisquel.info/trisquel-images/trisquel_7.0_amd64.iso.md5
I mean, I COULD probably work out some complicated gateway setup where I
'Torify' or 'VPNify' the Ethernet connection coming in to the laptop for the
Install
According to
http://cdimage.trisquel.info/trisquel-images/trisquel_7.0_amd64.iso.manifest
the Live system has everything to setup OpenVPN from the NetworkManager
applet (the package network-manager-openvpn-gnome is listed). If you need
another VPN client, then you could separately download the related packages
from http://packages.trisquel.info (using a secure connection) and install
them in the RAM of the live system with 'sudo dpkg -i'. You should then be
able to set the VPN up from NetworkManager.
It is not that complicated.