driver for wireless network on Dell Inspiron 3521

What drivers have you installed after Windows 7 64 Bit installation?

What are the hardware IDs of unknown devices, network controllers and display adapters in your system? See here:

http://dellwindowsreinstallationguide.com/downloading-drivers-checking-hardware-ids-and-downloading-and-installing-dell-system-drivers-in-the-correct-order/checking-hardware-ids-in-the-device-manager/

You can search for the drivers on the dell site using your service tag # @ 

https://www.dell.com/support/drivers/

Thanks
powershell has stopped working

In the device manager under Other Devices it shows Network Controller with the yellow asterisk. When I click on properties it tells me the drivers for this device are not installed.