How can i update my anti virus program without the help of the internet?

i dont have an internet connection at home, i know that i can update my antivirus program with the help of online updates, Im surfing through the net via internet cafe's, My theory is that ill update the anti virus program of the cafe's then copy the whole software and paste it to my pc at home via usb, but it doesn't work, how can i resolve my problem??

How can i update my anti virus program without the help of the internet?best antivirus software

Dear don't get in confusion. The tricks above are not safe because even if you don't use internet than also you need a anti virus program that protects your computer from the unwanted viruses, trojans and malware came along with other data, music, video, software or e-books from any other infected computer. So Use a free antivirus like Avast or AVG free antivirus. You can even get the updates of these softwares in .zip and .exe files You can search for these update files in google but if you don't like to search in google than goto http://www.softpedia.com and there you search for your antivirus update. there you will find that definitely. Download it and run it in your PC. your antivirus program will be updated. Or whenever you want updates pls send me a e-mail along with name of antivirus you use. i will send you the link from which you can directly download the updates