CheckOutEr:

How to Download, Install and Activate Kaspersky Internet Security 2012 beta-version?

To start testing KIS 2012 beta, download the beta-build from  
https://devbuilds.kaspersky-labs.com/devbuilds/KIS2012/
The folder with beta-version looks like 12.0.0.
You should download distributive of the kis12.0.0.*en.exe kind 
(usually the one with the highest number at the end).
During installation you will have to activate the product with 
the trial option and you will get 90 days trial version.
Once a new beta-version is released you will have to update your installation.
To do that download the last built distributive, exit the antivirus and uninstall 
previous build with the standard way (via Add/Remove programs). 
Then you may start installing the new build repeating the steps above. 

Index of /devbuilds/KIS2012/

Last-modified                        Size Name
07 Apr 2011 13:01:29                 1024 ../
25 Mar 2011 13:52:54                  512 12.0.0.241/
25 Mar 2011 13:53:10                  512 12.0.0.242/
25 Mar 2011 13:53:32                  512 12.0.0.267/
31 Mar 2011 04:32:19                  512 12.0.0.275/
Current: 06 Apr 2011 07:48:16                  512 12.0.0.293/

Index of /devbuilds/KIS2012/12.0.0.293/

Last-modified                        Size Name
05 Apr 2011 10:09:10                  512 ../
04 Apr 2011 16:26:02            150656168 kav12.0.0.293de.exe
04 Apr 2011 15:33:06            149978432 kav12.0.0.293en.exe
04 Apr 2011 15:59:10            151062880 kav12.0.0.293fr.exe
04 Apr 2011 15:07:07            151147752 kav12.0.0.293ru.exe
05 Apr 2011 18:27:52            150385144 kav12.0.0.294zh-Hans.exe
04 Apr 2011 16:24:17            150665656 kis12.0.0.293de.exe
04 Apr 2011 15:33:00            149951360 kis12.0.0.293en.exe
04 Apr 2011 15:59:02            151042632 kis12.0.0.293fr.exe
04 Apr 2011 15:06:53            151136448 kis12.0.0.293ru.exe
Current: 05 Apr 2011 18:27:36            150409032 kis12.0.0.294zh-Hans.exe

Enjoy!