Both, laptop and router is fully updated.
I changed uAPSD and I will be testing.
Security encryption does not matter, because I also tried with open network.
I cannot connect neither at home, work, my iphone hotspot or mobile modem/router.
My old Lenovo x220 and every other system connect my WIFI without any problems.
Only new x240 with 7260 has problems. Works only with static IP.