10/71 is easily within the realm of false positives, especially with all of these new AI engines.I want to use the original client simply because I am not going to risk infecting my computer just to play on some random server. 10/71 detections on Virus Total doesn't look like a false positive to me.
The original tibia8.0 client has somewhere between 6 to 10 detections, you think it's infected too?
It's always possible that something fishy is going on, but you can't conclude that from a 10/71 detection rate.
Also, if you're worried about a virus just run it sandboxed.