The driver says it's blocked? What does the message say exactly? I've never heard of an error message of a driver is 'blocked', but more information would be really helpful regarding that message.
Are you downloading your drivers from Dell directly? That should be your first port of call.
http://www.dell.com/support/home/us/en/19/product-support/product/inspiron-15-5558-laptop/drivers/advanced?os=wb64a
I see "Intel Dual Band Wireless AC 3160/7265 Driver" last updated September 15, 2015
That should be the appropriate driver you need.
I'm assuming you're downloading/trying to use "Intel PROSet/Wireless 3160 Bluetooth Application" ? That's the actual IT application, you still need the Wifi (and Bluetooth) drivers for it to...