I have a machine with truly horrible access to the internet and I need to install some antivirus on it. I half suspect that the reason for the network difficulty is a rootkit left by a previous owner, though it could be physical damage - the owner was having mental difficulties and when they were unable to open the laptop, they threw it across the room. I'm figuring it has to be a rootkit / boot virus, if it exists, because this is a fresh Windows 10 install at this point. In any event a normal Avast install fails saying that it can't reach the Avast servers or that internet access is not available, even though I can quite handily surf on that same machine... albeit with an occasional delay. What I'd like to do is install Avast and trigger a boot-time full scan. Is there any way to retrieve an off-line copy of Avast that I can load onto this machine when it's being stubborn about connecting?