my laptop always disconnected in wireless connection

hi everyone,i had just buy a Dell inspiron N411Z.my problem is the first time i connect the laptop to our wireless router,it work fine.it connect fast.but when i shutdown and restart my laptop,my wifi connection cannot connect.it always say cannot connect to our wireless router. i try the troubleshooter but it didnt work/i also try reinstall the driver,but again it didnt work.i try to turn off my router then turn it on again,i can connect to my wireless router for 5 to 10 minutes and its disconnected automatically.i try again the procedure i use,but again,it disconnected automatically.can someone suggest any possible solution to my problem.thanks in advance

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Re: my laptop always disconnected in wireless connection


There are various possible reasons for intermittent wireless connectivity. Please try the following steps:

1. Ensure that maximum distance between the laptop and router is less than 30 feet. Place the laptop very close to the router and check if that makes any difference

2. Check if you can connect to any other available network. An unsecured connection has a yellow mark besides it. (It does not ask for a network security key). If the wireless works fine with another network, your router settings may have to be changed. Else, try changing the 'wireless card' settings.

3. Maximize the performance of 'Wireless Card' installed in the laptop:
Note: Different wireless cards are shipped with Dell laptops. Please use the following steps to access and change card settings:
- Right-click the 'Computer' icon on the desktop or from the 'Start menu'
- Click 'Manage'
- Click 'Device Manager'
- Click the + sign to expand the 'Network Adapters' entry
- Right-click the wireless adapter (Intel wireless or Dell wireless) and click 'Properties''
- Click the 'Advanced' tab to configure the advanced settings
- Select Power Management, uncheck Default / Auto, and move the slider to Highest / Maximum Performance.
Note: If the slider is already at Highest / Maximum Performance, move the slider to another setting and then back to Highest / Maximum Performance.

Use this step if Intel Wireless card is installed:
- The following adapter settings can be found under the Advanced menu. Please match the settings with the values given below:



802.11n channel width for band 2.4

Auto (not in 20 MHz only)

802.11n channel width for band 5.2

Auto (not in 20 MHz only)

802.11n mode


Fat channel intolerant


Roaming aggressiveness


Throughput enhancement


Transmit power


Wireless mode


- Click 'Ok' to save settings and re-check the wireless performance

Use this step if Dell Wireless card is installed:
- Bluetooth Collaboration is set as 'Enabled' by default. Please 'Disable' it.
- Set value of 'Roam Tendency' as 'Aggressive'
- Save the settings and re-check wireless performance.

4. If the issue persists, try re-installing the 'Wireless driver'. Find the steps listed below:
Remove the corrupt wireless drivers
- Click ‘Start’, and then click ‘Control Panel’
- Click ‘Hardware and Sound’
- Click ‘Device Manager’
- ‘User Account Control’ dialog box appears
- Click ‘Continue’
- Device Manager Page opens up
- Locate a category called ‘Network Adapters’
- Expand this category
- Locate the wireless card that is installed in your laptop (It will show up as Dell wireless or Intel wireless)
- Right click it and click 'Uninstall' 
- Follow through with the uninstall process
- Restart the laptop Install fresh wireless drivers

- Click the following link to access all drivers applicable to your laptop: http://dell.to/Qnizfs 
- Enter 'Service Tag' of your laptop to access the drivers
- Select 'Operating system' installed in the laptop from the drop-down
- Locate category 'Network' and locate the 'Wireless Card' installed in the computer
- Click the driver name
- Click 'Get Driver'
- Download and save the file on 'Desktop'
- Right click the file and click 'Run as an administrator'
- Follow through with the installation process as per the on screen instructions
- Finish the installation and restart the laptop and check for the wireless now

5. If the issue persists, try flashing system BIOS:
Note: Before flashing the BIOS please check the following:-
- Battery should have 10% or greater charge
- Adapter should be connected
- No external devices should be connected
- All other programs should be closed and documents saved

- Locate 'BIOS' for your laptop on 'Drivers' page
- Click on “Get driver”
- Save the BIOS on your desktop
- Right click on it and select “Run as administrator”
- Follow the prompts on screen to install BIOS (System may produce beep sounds and may restart)
- Check for the wireless performance

6. If the issue persists, please run hardware diagnostics on the 'wireless card'. You may find the following steps useful:
- Click  http://dell.to/PQAV4Y to access the online Dell diagnostic tools
- Choose a 'Diagnostic Type' as 'Component'
- Select 'Network Card' from the list of system components
- Click 'Run Diagnostics' (Network diagnostics take around 3 minutes)
- Capture the results (If the diagnostics fail, the card will need replacement)

Hope this helps. Please reply if you have any further questions. 

Thanks and regards,
DELL-Chinmay S
To know more about Dell’s products, services and drivers & downloads, please go here

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