Cannot uninstall

Hello Toby.
We would request you to run the AVG remover tool to uninstall it completely. To run remover tool, please visit http://www.avg.com/tools#tba2 and click on "AVG Remover" to download the remover tool and run it on your PC. It will ask you to select which product you would like to uninstall. Please select "AVG Protection" and follow the setup instructions to uninstall AVG. Please, feel free to let us know if you require any further assistance. Thank you.

Hi
I installed AVG Protection (free) Zen yesterday, and this morning my machine was running very slowly.
I have other anti virus software, being McFee and Avast, so that may be an issue.
To fix my slow machine I tried to uninstall AVG, but it will not (nor will it update).
I get the following message.
Error code:
 0xC0070643
Description: Event exec_finished
Please, how can I delete the program?
Kind regards
Toby
Hello Toby.
We would request you to run the AVG remover tool to uninstall it completely. To run remover tool, please visit http://www.avg.com/tools#tba2 and click on "AVG Remover" to download the remover tool and run it on your PC. It will ask you to select which product you would like to uninstall. Please select "AVG Protection" and follow the setup instructions to uninstall AVG. Please, feel free to let us know if you require any further assistance. Thank you.
Toby, Just a point in passing. You should actually only have 1 AV prog installed on your system.
AVG Guru