Dell inspiron 5520 wifi not working properly!

Hi Sohailanwar433,

Let’s try the following steps:

• Click "Start"
• Right-click ‘’Computer’’ and then click ‘’Properties’’
• Click ‘’Device Manager’’ in the upper left corner(if prompted to continue by the User Account Control) click ‘’Continue’’
• In the ‘’Device Manager’’ window, click the next to ‘‘Network Adapters’’
• Double-click on the wireless card
• Click the Advanced tab
• In the Property box, click Roaming Aggressiveness and select option 2. Medium-Low from the drop-down menu
• In the Property box, click Throughput Enhancement and click to select Enable: from the drop-down menu
• In the Property: box, click lick Transmit Power and click to select option 5. Highest from the drop-down menu
• Click OK
• Restart the computer

If the above steps do not work, then perform the following steps:

Update the wireless drivers. First check the wireless card that’s installed on the computer from Device Manager

• Click on Start
• Right-click on Computer
• Click on Properties
• Click on ‘Device Manager’ on the left sidebar.
• Expand ‘Network adaptors’
• Check the name of the wireless card

Then go to our support site and install the drivers:

• Click on the http://dell.to/QjjZDA
• Type the service tag of your computer, click on ‘Submit’
• Click on ‘Network’ and download the driver as listed in device manager
• Click on ‘Download File’
• Check on the radio box ‘Single-file download’
• Click on ‘Continue’
• Click on ‘Save’
• Choose the location as desktop, save the file on the desktop
• Double click on the file; choose ‘Continue’
• Click 'OK' on ‘Select the folder’ where you want to unzip the files (make a note of the folder location)
• Click ‘Yes’
• Click ‘Ok’, follow the on screen instructions and install the file
• Restart the computer

In case you do not get prompts on the screen for instructions, then

• Browse to the folder where the files were unzipped and locate the setup file
• Double click on the file; follow the onscreen instructions to complete the installation

I would also recommend you to update BIOS. Here is the link http://dell.to/UwLlYT

Note: Before updating BIOS please ensure that:
*Battery is 10%> or >10% charged
*Battery charger should be connected
*No external devices (flash drives, printers, external hard drives) should be connected.
*All other programs should be closed and documents saved

Please reply if you have any questions.