Yes, i did it but nothing is changed. I have the same error, the same problem… 
Hello Lorenzo,
I am sorry to know that.
Please provide the screenshot of the error that you received for AVG free installation.
You can post the screenshot here in your topic. Click on 'Answer' & then click on the 'Image' [mountain symbol] & follow the instructions.
We request you to perform repair of AVG Protection program once as mentioned in this article: http://avgread.me/1BVxDSY .
Lorenzo, yes please click Run anyway and restart your computer to remove the traces completely.
I started the softwares and i read that there isn't any avg application:
Hello Lorenzo,
Thank you for sending the sysinfo details. I have escalated the issue to the senior technicians, they will analyze the log files and get back to you via email.
Your patience is much appreciated.
Hello Lorenzo, thank you for providing the screenshots. I would request you to follow the steps in this article http://support.avg.com/SupportArticleView?urlname=How-to-troubleshoot-issues-after-upgrade-to-the-latest-AVG-antivirus-product to run both the removal tools AVG Remover and AVG Clear tool to remove the AVG traces completely from your computer.
Once you uninstalled, please follow the steps in this article to reinstall AVG free http://support.avg.com/SupportArticleView?urlname=Download-and-install-AVG-AntiVirus-Free
Note: Before starting the installation, please select "Basic protection" to install AVG Free.
If you face any difficulties, please contact us.
Lorenzo,
I appreciate your efforts.
In this case, I request you to install AVG Antivirus Free 2017 via offline installer. Please use below links to install AVG Free Antivirus that suits your operating bit:
For 32 Bit operating system : http://files-download.avg.com/inst/mp/Antivirus_Free_x86_1819.exe .
For 64 Bit operating system : http://files-download.avg.com/inst/mp/Antivirus_Free_x64_1818.exe .
Keep us informed about the status.
Thank you.
Yes, i did it but nothing is changed. I have the same error, the same problem…