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ok thank you everyone. I am typing this from the laptop and the wifi is working.
I got the drivers DVD and used that.
Repaired the intel wireless drivers (w/e) that means.
Tried to reinstall the intel bluetooth driver but it only deleted.
Got the latest bluetooth drivers from the dell website and reinstalled.
When that finished the
"bluetooth devices" icon popped into the icons list. Wasn't there before. Goes on and off when i press fn+f2.
Inside, there was a wifi on/off set to off. turned that to on and, well, now it's working.
Thank you to everyone who helped me solve this problem.
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Something if this sort was happening to me every time i pit my windows 8 computer on airplane mode but I just fixed it... I went to "control panel" and then to "view network status and tasks" and then "troubleshoot problems" - from there you will see network: (and a listing items such as Internet Connections, ect ) click on network adapter. Go trough the troubleshoot and then you apply it and it should come on. Good luck 
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This is most likely due to the Intel Proset Software disabling your wifi card due to a ethernet cable being connected to the computer.
User was warned for this post
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I have had the same issue as described by OP, tried all kind of combinations and could not get my wifi to switch on even though it was listed as enabled in Network Devices however it would not scan to return a list of available wifi networks.
What I did eventually is, into Device Manager, clicked into Network Adapters and right clicked onto my Intel Wifi Device to Uninstall and ticked the box to delete the driver. Once done I simply installed the latest driver from Intel and viola!! wifi back to normal and fn/switch working normally with no red cross over wifi icon in the task bar.
Just my 2c, hope it helps!
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EPT
