'Software is not from a trusted location - do not install unless you are sure it is safe to do so' error message in Ubuntu 16.10
I have recently installed Ubuntu 16.10 on my HP desktop. (Well, via an ext HDD)
I clicked on the Backups 'safe' icon within System Settings and then clicked on the icon next to the instruction to 'download some necessary software'. The brings up a prompt to install the software, but with a warning that 'the software is not from a trusted source - do not install unless you are sure that it is safe to do so'. I'm still finding my way around Ubuntu so I'm not sure and opted to cancel. Everything else seems fine apart from that.
Has anyone else had this problem? Is there a fix?
BTW - I have Ubuntu 16.04 installed on my laptop and the same backup software works fine on that machine.
(I should mention that I'm pretty new to Ubuntu - just finding my way around at the moment really.)
Thanks in anticipation.