Marcos, thanks. I didn't think about the firewall setup. I didn't see the wifi network listed under known network when I was looking at linked devices but I'll definitely check it out. I'll come back on that.
I have a new wifi address, which is not detected/recognised by ESET. I have not deleted my previously existing wifi address, as unsure how to do that - so could this be the reason? If so, is using the new one a problem?