Same wireless adapter on both laptops, Intel Dual Band 7260 AC.
I tried multitude of settings on Adapter and router.
I tried setting channel on router to AUTO. Also tried with channels 1 and 11, same results (No wide channel) on both laptops.
WMM is also enabled in router.
Other router settings include:
Interface Type: N Only
Channel Bandwidth: 40
Transmit Power: 100
WMM: Enable
WMM Power Save: Enable
Frequency Band: 2.4Ghz
Security Mode:WPA2-PSK(AES)