If the official Ralink/MediaTek legacy drivers are difficult to locate, reputable third-party driver repositories can be used. Exercise caution when downloading from these sites:
The Kaiomy WA 54P Pro is an older but reliable 802.11g/b wireless USB adapter. It was popular in the late 2000s and early 2010s because of its high-gain antenna and affordable price. However, it is not natively supported by Windows 7. Microsoft Windows 7 does not automatically detect it via Windows Update.
To use this adapter, you need a legacy driver – typically one based on the Ralink RT2070, RT2770, or RT2870 chipset. Kaiomy, like many smaller brands, rebranded chipsets from Ralink (now MediaTek). Knowing this is the key to finding a working driver.
Result: Your device should appear as a “Standard Modem” or “Network Adapter.”