Open Kaspersky 2011 License Manager (from lower right corner).

Click ‘Activate the application with a new license’ button.any trial key first, by clicking the red X next to the key).

Select ‘Activate commercial version’ and enter the activation license code as AAAAA-AAAAA-AAAAA-AAAA3

Wait activation wizard message->Click OK

Wait for wrong activation code message->Click OK->

Screen will appear with KEY FILE BROWSE

Browse to the key location and activate kaspersky.

DONE

ENJOY....