What does the 5GHz mode warning mean?
Connectify Hotspot is using the same Wi-Fi band and channel that your wireless access point uses. Your PC acquires a connection via Wi-Fi, and if you share over the same device you use the same band and channel.
The problem is when the Internet connection is made via 802.11a or 802.11n at 5.8GHz. While Connectify Hotspot will share its connection perfectly on 5.8GHz, some devices cannot connect on 5GHz channels. This means your Hotspot will not show up for devices that can’t see 5GHz networks and may appear to not be working. If you see a “5GHz Warning” Connectify Hotspot has detected that you are using a 5GHz channel.
It is possible to have a 5GHz hotspot, but unfortunately, Connectify does not have the ability to control between 2.4GHz and 5GHz. The channel of the Hotspot is determined by the channel of the network that the adapter is currently connected to as well as your network adapter (if it supports 5GHz). If you are connected to a 5GHz network, then you will get a 5GHz hotspot. The same would also be true for a 2.4GHz hotspot.
Now, some cards might have an option that allows you to change between 2.4GHz and 5GHz band. You should try checking in the Device Manager under the Advanced Properties of your adapter for these options. If you have those options you can try just having the 2.4Ghz enabled.