Activating Kaspersky 2011 license using key file:

1. Open Kaspersky 2011 License Manager (from lower right corner).
2. Click ‘Activate the application with a new license’ button. (Delete any trial key first if you want, by clicking the red X next to the key).
3. Select ‘Activate commercial version’ and enter the activation license code as 11111-11111-11111-1111X
4. Click Next, an error dialog box will open saying ‘wrong activation code’ as shown:
5. Click Ok and you will then get the option to activate kaspersky using a key file.
6. Browse to the key location on your computer and activate Kaspersky.

KEYS 

*Kaspersky Anti-Virus 5
*Kaspersky Anti-Virus 6
*Kaspersky Anti-Virus 7
*Kaspersky Anti-Virus 8
*Kaspersky Anti-Virus 2010
*Kaspersky Anti-Virus 2011
*Kaspersky Anti-Virus for WKS & FS
*Kaspersky OpenSpace Security
*Kaspersky Personal Security Suite 2.0

*Kaspersky Internet Gateway
*Kaspersky Internet Security 6
*Kaspersky Internet Security 7
*Kaspersky Internet Security 8
*Kaspersky Internet Security 2010
*Kaspersky Internet Security 2011