In the Tech Support Forum (TSF) Networking Forum , we have recently been seeing quite a few problems with the Atheros AR5007EG & AR5007 adapters over the last few months, mainly concerning WPA and WPA2 encryption and Windows Vista.

The adapter gets an IP configuration, and shows as connected, but communication is non-existent or sporadic.
Log into the Router and disable the wireless security and see if you are now able to connect to the internet and surf OK.

Note: Unfortunately, the download links for these drivers (found below) are no longer valid. After extensive search, no alterative download links have been discovered. If or when new download files are discovered, we will update this article.

Here is a number of possible solutions

1) In Device Manager right click on the wireless adapter and select update driver. That apparently has worked for some users.

2) Download and install the latest wireless driver from your laptop manufacturer's web site support section, as some manufactures appear to now have a working driver available.
Toshiba - update has worked for some PCs
HP The latest HP Atheros driver dated Sept 2010 has fixed the issue - so check the driver date. However, that does not apply to all HPs / Compaqs machines - the user did an online scan for driver updates on the HP website here HP Product Detection which resulted in a solution.

If you still have an unresolved issue with this matter, make a note of the exact model of your PC , along with the windows version you have and post your problem in the Tech Support Forum Networking forum here . We will see if we can find the driver for you

3) On one occasion re-setting the router back to factory default and re-configuring the router settings has resolved the issue

4) A few members here with the same issue have found that the driver from this site ATHEROS drivers for Microsoft Windows resolved the issue

I do not know anything about the site mentioned ATHEROS drivers for Microsoft Windows

However, if you do decide to try the driver, please let us know the outcome in the TSF Networking Forum .

Direct links to the drivers are below. You only need to click on the green download button labelled click to download and wait for the file to download - you do not need to click on any other buttons to get the download started.

AR5007 Vista 32 Bit
Drivers for Atheros AR5007 and Windows Vista
Although this driver has shown up in BSODs (Blue Screen Of Death) on Vista SP2 systems, usually conflicting with updated Vista OS drivers like netio.sys, tcpip.sys and other networking related drivers.

AR5007EG Vista 32 Bit
Drivers for Atheros AR5007EG and Windows Vista

Assuming that after all the above the wireless still does not connect to the internet, all I can suggest is to use wireless security of WEP or to get an external USB wireless card.

You might also bug your laptop's tech support about the problem. Maybe people can put pressure on Atheros to find a fix.