http://forum.avira.com/wbb/index.php?pa ... 152f31d124
The irony of posting about Avira's views about any trojan when right now, their very last whole series update is screwing up machines all over the world.
If your installation is the middle version (Premium) and your machine is dual core, it will download but risks not working. If it's the free version you may also get stuck in a loop of messages telling you to download but your connection is throttled so the direct download from servers never starts or takes 2-3mins. Seems like the idea is to kick out anyone still using the software on a single-core machine because when I uninstalled it the PC sped up magically and AVG didn't have the same problem on the oldest PC- and found a trojan that Avira missed.
So you have to uninstall the old version before downloading any new one, and you will be taken to a nag screen offering a Premium licence for £10.99 and a much smaller link below it to continue downloading, choose download and you get a 2Mb stub, so really it prefers that you choose "Run" and have it install direct from the server - when it still might not work at the end. It's as big a PR screwup in the AV world as Norton's 2004 Internet Security update, which took then 5 years to recover from with Norton 360.
In the end I did get a key but it's on the laptop, the other three PCs I had to fix, I'll put something else on it for this year.