Laptop can t find wifi

[nestea_loves_you]

I have a Dell inspiron 15 3000 series and i changed my windows from 10 to 8.1. Now the problem is that the laptop doesn t detect any wifi signal. It connects to the internet only through cable. Before changing the windows it worked fine,but now it doesn t detect any wifi,mine or others around me. Please help.

 

[hang-the-9]

is the wireless card showing up in device manager with no errors?