Error 1921 in Uninstalling Kaspersky Internet Security 2009

Hi. I am trying to uninstall Kaspersky Internet Security 2009 since I already have Kaspersky Internet Security 2012.
I want to remove first the old version and perform a fresh installation of the newer version to avoid getting any issues.
But guess what, I got an error 1921 on uninstalling.
Please help.
Thanks.

Kaspersky Internet Security 2009
Error 1921.Sevice Kaspersky Internet Security (AVP) could not be stopped, Verify that you have sufficient privileges to stop system services.
Retry Cancel
