To all who want to install more then 1 AV, you need to disable one and let one run.

Actually it's not recommended to have more than 1 av running.

For the kaspersky alert when it catches virus, Yes you can change the sound. I'll guide you how but make sure you follow correctly.

1. go to C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 6.0\Skin\sounds

you will see the files "Infected". Now, you may want to copy and backup the file somewhere else incase you need it.
Next, choose the sound you want to replace. It must be in WAV format. Rename the sound to "Infected" without the " and place it in the sound folder located at
C:\Program Files\Kaspersky Lab\Kaspersky Internet Security 6.0\Skin\sounds

OK, any prob pls reply and I'll try to help.

Thanks.