I've had to reinstall Sage 2012 v18 and I auto checked for updates and it tried to install update 5 but I got the error code AUSE004. So I went online to Sage updates and tried to run the update from there but when it downloaded I got an error message saying 'The signature of accouts2012update5.exe is corrupt or invalid' am I trying to get it from the wrong place or is it to do with my software? I've currently got version 18.1.0.12