How do I uninstall the old AVG so I can install the renewed

It doesn't show my last comment so in case you didnt get it. I tried what you posted above but I got a pop up saying…We have detected that you have installed AVG protection  or older. It's not possible to uninstall such product by this remover.

If you really want to remove it you must download appropriate remover from following link
Install AVG on your PC, Mac | AVG installation files
or contact our support team

Hello Ruth,
We are sorry that you are unable to install your AVG Internet Security in your PC. Please try to follow the below steps to remove AVG 2017 and then reinstall AVG Internet Security:
1. Use the link https://share.avg.com/steam/PSP/AVG2017/AVG_Clear.exe to run the AVG Clear tool.
2. Open the AVG Clear tool, click Yes in the User Account control dialog.
3. Click No in the Windows safe mode dialog.
4. Select the installed version of AVG and also check the box 'Uninstall AVG Zen'. Then click Uninstall, and Restart computer.
Use the link to reinstall AVG Internet Security: http://avgread.me/1DXPL5z .
Please feel free to contact us for any assistance regarding AVG.
Thank you.

Got a pop up saying I needed to renew so I did. Downloaded it and tried to install but it told me I it was incompatible with the new and I needed to uninstall the old, but it won't let me. It says Installation Already In Progress but it's not

Delinda,
We regret for the inconvenience caused. It seems that you are using AVG Internet Security 2016  in your PC. So you can use this link to activate it with new license number http://avgread.me/1bsLsmy . Please feel free to write back here for further assistance with AVG.
Thank you.

Hello Ruth,
We are sorry that you are unable to install your AVG Internet Security in your PC. Please try to follow the below steps to remove AVG 2017 and then reinstall AVG Internet Security:
1. Use the link https://share.avg.com/steam/PSP/AVG2017/AVG_Clear.exe to run the AVG Clear tool.
2. Open the AVG Clear tool, click Yes in the User Account control dialog.
3. Click No in the Windows safe mode dialog.
4. Select the installed version of AVG and also check the box 'Uninstall AVG Zen'. Then click Uninstall, and Restart computer.
Use the link to reinstall AVG Internet Security: http://avgread.me/1DXPL5z .
Please feel free to contact us for any assistance regarding AVG.
Thank you.