I can't update my iPod Touch 4 to iOS 4.3.3 (please read description)?

Whenever I try to update me iPod to 4.3.3 I get an error message saying an unknown error occoured. Error (3194). I have done a little research on the error and have found out that apple is trying to restrict people who have jailbroken from updating. I have not jailbroken my iPod Touch 4 but i did try to jailbreak my iPod Touch 3G on the same computer. Every site i go to tells me to go into my host file and put in some line but when I do and I try to save it i get a message saying i don't have permission and to contact the administrator to get permission. I AM THE ADMINISTRATOR!!! So if anyone could help me either update my iPod or save my host file I will grant them 10 points as long as it works. Thanks!