In this case that you have an Intel® Dual Band Wireless-AC 3160 and based on the description of your issue, please follow the following steps:
1 - Access Control Panel >> Device Manager >> Network Adapters
2 - Select the Intel® Dual Band Wireless-AC 3160 and right click on it.
3 - From the dialog box that opens after you right clicked on it, select Properties.
4 - Once Properties open, select the tab that says Advanced and from the options select HT mode and change the value to VHT mode.
Additionally, we would like for you to take a look at this link as it contains very useful information that might help you as well: 802.11ac Wi-Fi for Dummies
Let us know if this helped you.