Finding official drivers is difficult because there is no centralized manufacturer website. Users often have to rely on drivers provided on a mini-CD or from community-shared links on forums like Microsoft Q&A Manual Setup:
The Qts1081b typically uses a Realtek RTL8152 or RTL8153 chipset. The driver below is compatible with both. --- Qts1081b Usb Ethernet Adapter Driver Windows 10 64 Bit