Note: 40 MHz in 2.4 GHz can cause interference with neighbors; use only in low-density areas.
Corrupted driver, conflict with another device, or hardware failure. Solution: 802.11n Wlan Driver In Windows 10 8 7
Windows 10 fully supports 802.11n, including both 2.4 GHz and 5 GHz bands. However, some features like WMM (Wi-Fi Multimedia) for QoS may require updated drivers. Note: 40 MHz in 2
: Allows users to manually enable or disable "802.11n mode" within the driver's advanced properties to optimize performance for specific routers [30]. How to Install or Update the Driver conflict with another device