Disabled components with my AVG protection

Babette, Disabling Windows Defender (http://windows.microsoft.com/en-gb/windows/turn-windows-defender-on-off#turn-windows-defender-on-off=windows-7).
AVG Guru

Thank you AVG Guru.  Once I turn Windows Defender off, what is the next step?  I have tried to repair AVG 2015  but it keeps coming up that there is a Firewall that is preventing  the repair.

Got two important messages from my Windows 7 Action Centre to say that there was no security.
It offered two programmes - AVG 2015 which I paid for and installed in March 2015 and Windows
Defender.  I clicked on Windows Defender by mistake and now all my AVG components have been disabled.  What should I do to get AVG working again. I have tried to disable Windows Defender, tried to repair AVG and re-install it but nothing will work.  Please can you help.

Hello Babette. I would request you to run AVG remover tool based on your OS (32-bit or 64-bit) to completely remove AVG and then re install. To determine whether your OS is a 32-bit or 64-bit, please click on this link. http://support.microsoft.com/en-us/kb/827218 .

To download the remover tool, please click on this link: http://www.avg.com/utilities . Thank you.
Thank you AVG Guru.  Once I turn Windows Defender off, what is the next step?  I have tried to repair AVG 2015  but it keeps coming up that there is a Firewall that is preventing  the repair.  
Babette, Disabling Windows Defender (http://windows.microsoft.com/en-gb/windows/turn-windows-defender-on-off#turn-windows-defender-on-off=windows-7).
AVG Guru