

Tails is a bit overkill, even for this. It’s not just privacy focused, it’s for the same people who need to use TOR (Tails even routes all traffic through TOR by default IIRC, no?), i.e. those who are sharing classified government intel or running large darknet drug markets. Unless OP is that paranoid, they can probably start off with a basic Debian or something, which is already leagues ahead of Windows in terms of privacy.
Do you have a static IP address? CG-NAT has done a really great job of hindering torrents, since my understanding is that at least one side of the connection needs to have an open port. So, if you don’t, then only the few people who do are able to download from you, which can make it seem like no one wants your stuff.