LG provides a universal updater for Windows. Download the LG Update Center or LG Easy Guide from the Microsoft Store or LG’s website. This tool scans your connected LG peripherals and automatically installs the requisite drivers, including the AN-WF500 firmware.
You need the Realtek USB driver. Since Realtek's official site is difficult to navigate, it is often easier to use a trusted driver archive or a driver utility.
If you are using Windows 7 or 8.1, the LG AN-WF500 may not work automatically. Microsoft removed generic HID drivers for certain proprietary 2.4GHz devices in older updates. Lg An-wf500 Windows Driver
Solution:
The LG AN-WF500 is internally a Realtek RTL8188CU device. The "helpful paper" you are looking for is not an LG manual, but rather instructions on how to manually map the LG USB ID to the generic Realtek driver in Windows Device Manager. LG provides a universal updater for Windows
A common myth is that the AN-WF500 can be reprogrammed with Logitech’s Unifying Software. This is false. The RF chips are completely different. Do not attempt to flash Logitech firmware onto the LG dongle—it will brick it.
Before diving into drivers, it is vital to understand the hardware. The LG AN-WF500 is a small USB dongle that looks like a standard wireless mouse receiver. It was sold as an accessory for specific LG projectors (like the LG PF1500 and PH550) and older LG Smart TVs to enable Screen Share and Wi-Fi Direct features. If that fails, you must use the LG
Important distinction: It is not a general-purpose Wi-Fi adapter (like a Netgear or TP-Link dongle). It uses a proprietary chipset (usually a Ralink RT3370 or similar) locked to LG’s custom firmware.