update

[zircom]

Hi, i need update whitout internet. How i do???

[scythe944]

Download the updates from a computer with the internet from here: http://www.avast.com/eng/updates.html

Then, install them on the computer that doesn't have internet access.

[zircom]

Hey, do you know how I protect my usb?? whit avast?

[scythe944]

You can use this utility: http://blog.didierstevens.com/programs/usbvirusscan/


Or as DavidR Suggests:

I would also suggest Flash Drive Disinfector
Download Flash_Disinfector.exe by sUBs from >here< and save it to your desktop.
Double-click Flash_Disinfector.exe to run it and follow any prompts that may appear.
The utility may ask you to insert your flash drive and/or other removable drives including your mobile phone. Please do so and allow the utility to clean up those drives as well.
Wait until it has finished scanning and then exit the program.
Reboot your computer when done.
Note: Flash_Disinfector will create a hidden folder named autorun.inf in each partition and every USB drive plugged in when you ran it. Don't delete this folder...it will help protect your drives from future infection.

Also see this link for more information on Flash Disinfector, http://experi3nc3.wordpress.com/2007/05/10/flash-disinfector-by-subs/