Avast 5 Professional:
Key : W5528733R9942A0911-8NM6FXWV

Improve your Mac email security
avast! Free Antivirus for Mac scans all your email traffic for viruses and other malware, including any sent as attachments from Windows users, to ensure your Mac stays clean.

Avast antivirus has to be updated with a license key approximately two months after it is first installed on Microsoft Windows. It is important to obtain and register the new Avast license key to protect the computer from viruses, worms, malware and spyware. Register on the Avast website to update the Avast antivirus with the new license key. On successful Avast license key registration, the new license key is sent on the email account which is provided during registration. It is necessary to obtain and register a new Avast license key to keep Avast antivirus updated for data security and for data protection.
Engine: Blocks viruses & spyware
Remote: Allows assistance from a geek friend
SafeZone: Secures shopping & banking
Sandbox: Lets you surf the web virtually
Sandbox: Runs risky programs virtually
Firewall: Blocks hacker attacks
Firewall: Secures personal data
Firewall: Secures your identity
Anti-spam: Stops annoying SPAM
Anti-spam: Blocks phishing scams
Summer's over, time to be responsible – at only half price
2: Your license key is:
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C24899028H1200A0614-X2HSV9AS
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Avast - Obtaining your free license key

Avast is an antivirus application that requires a free registration key to use. This key is valid for two months free use. Here is how to obtain your key:

Follow this link: http://www.avast.com/registration-free-antivirus.php
Fill in the registration form and click on Register to obtain your licence key. See the image below.
You will receive your licence key directly via e-mail.