Let’s be honest: Ethernet cables are reliable, but they turn your sleek PC into a tripping hazard. If you’ve finally decided to cut the cord on your Windows 7 machine, you’ve probably just bought a USB WiFi adapter.
If you can’t get it working after 30 minutes, your best bet is buying a used "TP-Link TL-WN722N" (Version 1) on eBay. That specific adapter is the gold standard for Windows 7 compatibility.
Windows 7 / Networking