The desktop I mentioned earlier (with no detection), is running W8.1 while the laptop is on W10. I tried it on a family member's laptop running W10, also using ESET, and it reported a detection.
I also tried a different ISP, by tethering my phone and I no longer have a detection on my laptop.
Modifying the DNS didn't help, the threat is still being reported. So, after all, looks like something to do with my ISP?