Hi thamseer24,

Inspiron n4010 computer is not tested to work with 'Windows 8'; therefore you may not find its 'Windows 8' compatible drivers listed on Dell support website. You may experience issues with the laptop functionality when used in 'Windows 8' environment. Please check the list of all 'Dell computers' tested with 'Windows 8': http://dell.to/OgPlyC

You may still try performing the following steps to see if they work:

1. Make sure that wireless connections are turned on:
- On the 'Start screen', type 'Control Panel', click the 'Apps filter', and click 'Control Panel'
- In the left pane, click 'Wireless'
- In the right pane, verify that 'Airplane mode is off' and that 'Wireless devices are on'
- Check the wireless functionality now

2. If the issue persists, try the 'Network Troubleshooter' to see if that works:
- Swipe from the right edge of the screen and tap 'Search'
- Type 'Network troubleshooter' in the 'search box'
- Click 'Identify and Repair network problems'
- Please capture the 'results' and re-check functionality

3. If the issue still persists, check status of 'Wireless Device' in BIOS:
- Power off the laptop
- Power it back on and as 'Dell splash screen' appears, repeatedly tap < F2 > (BIOS screen appears)
- Use arrow keys to navigate to the option: 'Advanced' (Following screen appears)
- Use arrow keys on the keyboard to open 'Advanced' section and further navigate to 'Wireless'
  
- Please ensure that 'Wireless Switch' is set to 'All'; and Internal Bluetooth/WLAN/WWAN are all 'Enabled'
- Tap < F10 > to save settings; and exit
- Enter into 'Windows' and recheck the results
  

4.If the issue persists, please try tapping < F2 > to enable 'Wireless'; If that does not work, try < Fn> together

5. If the issue still persists, check the status of 'Wireless adapter' in 'Device Manager' environment:
- 'Right click 'Computer', click 'Manage' and click 'Device Manager' to access the 'Device Manager' page
- Locate and expand 'Network Adapters' category
- Please capture the details of 'Wireless Card' installed in the system (Note if any yellow/exclamation mark' is present besides it)
- You may have to try updating the 'Wireless Card Drivers' to fix the issue

If you need help identifying the correct driver for installation, please share the following details:
- Operating system installed in your laptop (Windows 8 32 or 64 bit)
- Details of 'Wireless Card' found in 'Device Manager' (This model is generally shipped with the following cards: Dell wireless 1501/1502 or Intel Centrino 6200/1000)

With this information handy, I would be able to help you with the best available 'Wireless card' driver compatible with 'Windows 7'; and 'Windows 8' if available.

Hope this helps. Do reply if you have any further questions. Glad to assist.