When running Windows, I had excellent experience with AVG (and with Avira as well), which did not interfere with downloads. However, it - and/or my firewall - did interfere with installation of OOo updates (good old error 1935, about which so much has been written so often on this forum), so the following advice still applies : after downloading OOo, disconnect from the internet, disable both anti-virus programme(s) and firewall(s), install OOo, and then, before reconnecting to the internet, re-enable the security programmes (not Norton !)....
Henri
