1.Keys only work with Avira Internet Security 2013 (Formerly, Avira Premium Security Suite)
2.Windows 8 is NOT Officially Compatible with AIS but Latest Version i.e 18.104.22.16861 is working fine(Tested my self)
3.It is RECOMMENDED to perform a CLEAN installation of AIS from the above link and during the installation(Not Recommended) uncheck "AHead"(To make Scanning Faster i.e No false-positive), "Web Protection" and "Mail Protection"
4.To Prolong Activation Period, u must update your Avira Product manually(its for "PRODUCT UPDATES", "Virus Definition Update" has nothing to do with it).
Open Avira, Extras- Configuration- Expand update- Product update and click "Notify user when new product are available". At Below, you must enter at least 3 days or more because if you update regularly, your product key will be expired or being blacklisted soon.
1.Right Click on any Key.
2.Hover ur cursor to "Open With" And Click on "Antivir License Manager"
1.Open up Avira.
2.Click Help - License Management.
3.Click on hbedv.key link that is right above the button for Proxy settings