Connect to Kaspersky homepage and DOWNLOAD the Install file. Then, use THIS Kaspersky Internet Security LIFETIME Key
http://adf.ly/8JNLAHow to install and use Kaspersky Internet Security LIFETIME Key:
Step 1: Connect to Kaspersky homepage and DOWNLOAD > Install > Restart
Step 2: Uncheck "Enable Self-Defense" in Advanced settings > Self-Defense then Exit Kaspersky Internet Security.
Step 3: Copy THIS file to your KIS installed directory (C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 2012)-May be you have to copy in DOS mode (use Hiren's Boot CD or st like that).
Step 4: Turn on KIS and type above Key to active. There are some alert messages, don't worry ab' it ! Use above Install file and Install KIS again, you'll get the LIFETIME KIS.