Blocking download

Hello Ruben,
Thank you for reaching AVG Support Community.
I'm sorry to know that you're facing this issue.
AVG shouldn't cause this error. However, to confirm, please turn off AVG Secure VPN and disable AVG Internet Security temporarily and perform the upgrade of OS.
This article will help you to disable the AVG Internet Security in your PC.
Please take a screenshot of the error message and post us here, so we shall check and help you further.
Thank you.

When upgrading win7 to win 10 from Microsoft, the last step prompts: error “meta/data migration” PC has been restored to it’s previous system. 

Is AVG internet security and VPN causing the error?

Hello Ruben,
Thank you for reaching AVG Support Community.
I'm sorry to know that you're facing this issue.
AVG shouldn't cause this error. However, to confirm, please turn off AVG Secure VPN and disable AVG Internet Security temporarily and perform the upgrade of OS.
This article will help you to disable the AVG Internet Security in your PC.
Please take a screenshot of the error message and post us here, so we shall check and help you further.
Thank you.