thanks but a few more questions as that didn't seem to work (sorry if this is super-basic and i'm being a dunce - not long had a mac and definitely never done anything like this before or used Terminal)
1. i typed what you said to above and hit Return. It gave me a warning about sudo commands having potential harmful effects but after putting it in, it then simply wrote this next:
sudo /Applications/TextEdit.app/Contents/MacOS/TextEdit/etc/hosts : command not found
2. Was I wrong to hit Return after typing what you said or should I have put in a space and then my password then hit Return?
3. is there something specific about the way you typed that eg. the space between 'sudo' and the '/Applications' - is that on purpose?
4. what is TextEdit where I 'edit the file and save it'? is that a program or application? (again...sorry if i am asking really simple/obvious questions!)
Thanks for the quick reply before. :-)