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Because "802.11n" is a standard, you must identify your specific hardware chipset to find the correct driver.
To find the correct 802.11n WLAN USB driver for Windows 7 (64-bit), it is best to identify your specific hardware chipset (e.g., Realtek, MediaTek/Ralink) rather than downloading a generic "802.11n" file, as the name refers to the Wi-Fi standard, not a specific driver How to Find Your Specific Driver 802.11 N Wlan Usb Driver Windows 7 64 Bit Download