Laptop does not find the wifi network

It's probably a bit of a stupid question, but I guess I'll ask in all cases... What should I do to my laptop, if not to find a wi - fi network you want to connect to? When I get the help, I thought that an ethernet cable is unplugged, but my other laptop is to find a network very well, so why not this particular laptop?

Seems to me that you have not installed the drivers for your wireless network card.

Try to go to the Dell support site - below is the link to the drivers for your laptop special.
If this does not work somewhere on your laptop (below) be a sticker with a "service tag" will enter this on the Dell site and it will connect you to the drivers you need.

Look at the link below and download the driver for the card relevant wireless in the category 'Network' - unfortunately I do not know who it will be exactly so some trial and error may be needed.

Dell link: http://www.dell.com/support/home/uk/en/ukbsdt1/product-support/product/inspiron-15-3521/drivers

Judging by the result of your device manager that you may need to install some other drivers on the Dell site. Ideally, you should have no device showing that they need a driver.

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