Here is what we know about this wireless adapter.
Notice that it seems to boil down to either an encryption problem or a device driver issue.
Since you indicated that you already entered the mac address of the pc into the router,you just might go back and disable mac address filtering anyway to eliminate that possibility.
Disabling encryption is done on your router.Your user's manual should be helpful for that info.
If that works then we probably would suggest starting with wep encrpytion and if that works see if you can enable wpa at a minumum.
Courtesy of ETAF and Terrynet on the Networking Forum:
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Atheros AR5007EG & AR5007
We have recently been seeing a lot of problems with the above 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.
--- Please post back here if that works or does not work.
Here are a number of possible solutions
--- 1) In Device Manager right click on the wireless adapter and "update driver." That apparently has worked for some posters.
--- 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 poster did an online scan for driver updates on the HP website here HP Product Detection which resulted in a solution. Solved: Can't connect to internet wirelessly - Atheros AR5007 Wifi through Clear Comm - Tech Support Guy Forums
If you can post the Make and EXACT model of your PC here, along with the windows version you have and we will see if we can find the driver and will post a link as a reply here.
--- 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 posters here with the same issue have found that the driver from this site ATHEROS drivers for Microsoft Windows resolved the issue
http://www.atheros.cz/
Threads are here
Solved: Public Network - Access: Local Only (Please help!) - Tech Support Guy Forums
http://forums.techguy.org/networking...ess-local.html
Solved: NetGear WNDR3700 Incompatibilty W/ Atheros AR5700 - Tech Support Guy Forums
http://forums.techguy.org/networking...tibilty-w.html
Solved: Local connection only when connected to secured wirless - Tech Support Guy Forums
http://forums.techguy.org/networking...only-when.html
Solved: Unidentified Network - Tech Support Guy Forums
Unidentified Network
http://forums.techguy.org/networking...d-network.html
I do NOT know anything about the site mentioned ATHEROS drivers for Microsoft Windows
http://www.atheros.cz/
However, if you do decide to try the driver, Please let us know the outcome
Direct link to the drivers are below
You only need to click on the green download button labelled " click to download " and wait, the file will 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
http://www.atheros.cz/atheros-wirele...et=21&system=3
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
http://www.atheros.cz/atheros-wirele...et=22&system=3
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.