We have several Lenovo laptops, mostly Yogas. All are having the same issue. They connect fine to our (and other) wifi network, but the drop after a few minutes. We've updated the drivers, turned off power saving, and it still happens. We've tried limiting the dual band to a single frequency, no luck. Anyone else have this problem. We have a variety of other laptops by other manufacturers that work fine. We like the Lenovos better other than this problem.