Gmail automatically scans every attachment when it's delivered to you, and again each time you open a message. Attachments you send are also scanned. Checking attachments for viruses protects our users and their information, and prevents the spread of viruses. If a virus is found in an attachment you've received, our system will attempt to clean the file, so you can still access the information it contains. If the virus can't be removed from the file, you won't be able to download it. If our system is unable to scan certain files, you'll see an error reading 'Oops... the virus scanner has a problem right now.' You'll have the option to try again later or to download at your own risk. Please note that if Gmail can't scan the contents of the file, we can't guarantee that it's safe to vi...