Why can't my desktop connect to our Wi-Fi at home but does connect to moble hotspot?

Suddenly my desktop won't connect to our Wi-Fi. All other devices such as laptops, phones and tablets connects just fine. I tried connecting it to my iphone's hotspot and it works. I tried to unistall and reinstall the wireless adapter but still won't work. I also tried to reboot the router and even tried to change the channel but still failed to make it work. Do you have any other way to make it work? I have windows 7 on my desktop.

You have to manual setting that.

Go to depending on your router manufacture and go to and address that may be 192.168.0.1 and find the wirelss setting and if its disabled enable it