If you cannot or are unable to uninstall Karpersky AntiVirus, Kasperky Internet security or any other Kaspersky security software, you can download and use Kaspersky Products Remover.

Kaspersky Products Remover will fully uninstall any Kaspersky software from your Windows computer. It will even delete all activation data from your system.

Once you have downloaded the tool from here, reboot your computer in Safe Mode and run the tool. Select the Kaspersky product you wish to ununstall. It will safely and completely remove the Kaspersky Lab security software from your Windows PC.

If you are using some other security software that you want to uninstall completely, have a look at this post on AntiVirus Removal Tools & Uninstallers for popular AntiVirus programs.