When trying to unistall kaspersky: this action is only valid for products currently installed

When trying to uninstall kaspersky anti-virus 2013 on control panel, I receive the message: 'This action is only valid for products that are currently installed.

When trying to install Bitdefender, it gives the message that it can uninstall kaspersky and that I should do it myself. But I can't and Bitdefender can't. What can I do.

Thank you.

Answers