Trojan horse virus is really quite, it collectes incomming and outcomming data from The pc. However If it is quarinteened it means that Windows has encrypted and moved to file so your pc does not get any harm.
I agree with SR-71, it sounds like the potential threat was blocked by your AV. You may want to check your AV's quarantine to see what the threat was, if you're curious about what it caught. If you happen to be using Avast, here's how to use the Virus Chest: https/support.avast.com/en-ww/article/21
For additional peace of mind, run a full scan on your drives as well, with high sensitivity if you are able to adjust that.