Hello Rafael,
We understand how something like this can really try your patience. We are sorry for the difficulties you are currently experiencing. Could you please let us know whether you have installed any other AVG product or any 3rd party Antivirus product in your pc before or active in your pc? so that we are happy to assist you better.
Please feel free to contact us for any further assistance. Thank you.
Ihave experience the error 0xc0070643, please advise how to fix
the notebook come with macfee and i uninstall, but avg made this error
Rafael, Are you sure that you fully removed McAfee?..
McAfee total removal… (http://download.mcafee.com/products/licensed/cust_support_patches/MCPR.exe).
AVG Guru