Thank you stevejobsfan0123 but unfortunately I tried this (twice) to no avail... When I update the software and then re-start the computer, the error reads:
"The Norton Anti Virus auto protect could not continue. Please run Live update or reinstall norton antivirus and restart (code 10)"
When I try and access Safari it says:
"You can't use this version of the application Safari with this version of Mac OSX. You have Safari 5.0.6"
Any tips would be greatly appreciated!