This is what you can do:
1 - Go to Device Manager >>> Network Adapters >>> Select the Wireless Adapter.
2 - Right click on the wireless adapter and select properties, when the dialog box pops up, from the drop down menu select Preferred Band and set the value to Preferred 5.2GHz Band.
3 - Select Wireless mode from the same drop down menu and set the value to 802.11a
Let us know if this helped you.