I have installed AVG Internet Security Free when using share deleted files and ISO Windows and when

Hello Hamda,
Do you mean you deleted files using AVG Files Shredder and when recovered them, their extension changed? If yes, please be informed that files deleted using AVG Shredder cannot be recovered even with the use of advanced disk utilities. If you use any 3rd party recovery tool and manage to restore them, we can not guarantee they will work fine.

I have installed AVG Internet Security Free when using share deleted files and ISO Windows and when using file recovery programs has changed the extension to zzzzzz I hope help

Hello Hamda,
Do you mean you deleted files using AVG Files Shredder and when recovered them, their extension changed? If yes, please be informed that files deleted using AVG Shredder cannot be recovered even with the use of advanced disk utilities. If you use any 3rd party recovery tool and manage to restore them, we can not guarantee they will work fine.