Have a Lenovo Yoga 2, 3 in 1 notebook and unfortunately it runs Win 10, had it off for a while (very common) and turned it back on earlier today to change the wifi passkey that I just changed yesterday....... "passkey is not correct" over and over despite knowing for a fact I'm typing in the correct passkey........ Clicked "forget" on my network (in the Lenovo), rebooted, same problem. The wife's Win 10 connected immediately yesterday when I updated the passkey on her laptop....... This is bull shit.