I have had a brand new Aspire 7720 for about two weeks. Until 2 days ago, the wireless LAN was working fine. Then, I logged on one morning and it simply wouldn't work. I now find from the net that this is a common issue with Aspire laptops. Essentially the network controller 'is ot configured correctly'. I have tried downloading drivers, uninstalling and reinstalling, but nothing works. I have also been searching far and wide for a solution on the net, without success. Help!
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Are you connecting to your own wireless router? If yes, have you changed anything in its configuration, or inadvertently reset it? If you're connecting to someone else's router (neighbor, etc.) it could be that they have locked you out. Does the wireless network show as secured? This sounds more like a security issue than hardware or driver.
Try turning off the wireless router fo 30 secs and then power it up again. When the LEDs light up, then boot up the HP laptop.
If this doesn't work, then check the laptop to see if the wireless router issued the HP laptop with an IP address. to do this - click on Start - Run - type cmd and press Enter. This will open a DOS command box, then type ipconfig and press Enter.
If the IP address returns 0.0.0.0 then the wireless router didn't issue the HP with an IP address and either the wireless router is faulty or the wireless card is faulty or it has lost its LAN configuration.
If the wireless router LEDs are all on, try connecting a LAN cable direct to the LAN port on the router and the laptop to see if it connects to the Internet. If it connects then install the latest wireless card driver and configure it with the wireless router's settings.
Your Intel wireless-G 2.4Ghz is defective, all you have to do is test another wireless LAN to make it sure that is working via USB panel. I encounter this kind of problem and wish it would be the same like me. Usually this kind of problem cannot see itself that is defective but it is working good to your PC. Just try a new wireless LAN if might work. Good luck!
Well, i had this same problem (it's specific to SP2, does not happen with SP1) and this is is the way i fixed it (I don't like it very much, but at least it worked):
1) Unistall Realtek USB Wireles LAN utility
2) Go to Control Panel -> System -> Hardware ->Device Manager->Universall serial Bus Controllers
then choose the one with the word "enhaced host controller" or similar (usually the last one), right clik->Disable
3) Install Realtek USB WLAN Utility and everything should work fine.
The problem (a quite annoying one) is that now your usb flash disks will work slower than it could. For small amount of data (<100M) it doesnt matter. When you have to work with huge data transfers to you USB you can enable the controller for the moment.
I know it's not the greatest solution ever but if it's your only way to get internet connection it worths a try.