My laptop wifi is not working after I changed my os

my laptop wifi is not working after I changed its os . I have tried installing wifi drivers,but it was vain.can u suggest somethng to make my wifi work..??
my laptop is dell inspiron 3542 and im having win 8.1
Asked May 23, 2015
WIFI may not work in the laptop after 'Windows re-installation' due to various possible reasons:
1. 'Wireless is not enabled'
2. 'Wireless Card' drivers in the laptop are either corrupt or missing

a) Let us check 'Device manager' to verify the current status of the wireless card installed in the laptop. Please follow the steps listed below:
- Click 'Pearl/Start' icon
- Type 'devmgmt.msc' in 'Search programs and files' text box (without quotations)
- Tap < Enter > and 'Device Manager' page appears
- Locate 'Network Adapters' category
- Expand it by clicking the 'arrow sign' besides it
- Check if any yellow mark is present besides the device
- If not, please browse through the complete devices listed to check for any other yellow mark
- If yellow mark is present, capture its details and report
- If no yellow mark is seen, it indicates that wireless drivers may be installed properly; however is not enabled

b) If no yellow mark is observed, enable the 'Wireless capability' of the laptop. Please follow the steps listed below:
Use the Fn + F2 key to turn Wireless On or Off. (If no change is observed, tap only F2 and re-check)
Alternatively, you may use 'Windows Mobility Center' in the control panel to check the status of the wireless connection.

To access Windows mobility center:
Click 'Pearl/Start icon' -- > Type "Windows mobility center" in search bar above that -- > Click it. You will be able to find option to enable or disable wireless.

If you are not able to use Fn + F2 keys combination, you may install Quickset application for your computer from the link below:
Download this file on the 'desktop' screen and follow the on-screen instructions to complete the installation. Once installed, it will enable the Fn+F2 key combination and you will be able to activate the 'Wireless'.

Hope this helps. Do reply if you have any further questions. I would be glad to assist.
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