I tried everything I could to turn the WIFI back on my Dell Inspiron LAPTOP 1545 after I recently did modification on my symantec antivirus, but failed. So far, these are the steps I performed in trying to turn on the WIFI.
1. There's no "ON and Off "switch.
2. Pressed "FN" and F2.
3. Start>Control Panel>Network Connections>find the WIFI Adapter>Right Click>Enable.
Any help is greatly appreciated.
Try pressing only F2 key which enables/disables the wireless on the computer.
As you've mentioned that you did some modification on the Antivirus. You may try to perform System Restore and see if it works. Press and hold the Windows key and press 'R' key. This will open the run window -> Type 'rstrui' without the parenthesis, click on 'Ok' -> This will open the System Restore window. Follow the on-screen instructions to restore your computer to an earlier date. Please refer Here for more information.
Hope this helps.
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thank you three much