StarTech makes several models (e.g., USB2VGAE2, USB32VGAEH, USB2VGAE3). The driver depends on the chipset inside (DisplayLink, Fresco Logic, or SiS). Most modern StarTech USB-to-VGA adapters use DisplayLink .
If you encounter issues with the driver installation or the adapter not working properly, try: startech usb to vga adapter driver
If you don't have it: