Hi Andy,
take a look at your software settings and check your updates:
You can also run this terminal command (Ctrl + Alt + t) but check your settings first, it may help?:
sudo apt-get update && sudo apt-get dist-upgrade -f
Let us know if it helps. 
Hi Andy,
take a look at your software settings and check your updates:
You can also run this terminal command (Ctrl + Alt + t) but check your settings first, it may help?:
sudo apt-get update && sudo apt-get dist-upgrade -f
Let us know if it helps.