I have an HP pavillion desktop (s5360f) with Atheros 802.11 a/b/g/n Dualband Wireless Module and D-Link router DIR-615. My numerous Laptops and iPhons / iPads work fine, but this desktop which is further away from the router (in another room, about 20 meters) only shows 1-2 bars of wifi. First I bought a big additional D-Link antenna (7Ghz) but it didn't really help - sometimes connction shows 3 bars. I was told this antenna should help a lot. Then I checked with my router settings and saw that the HP uses "g" connection when everything else uses "n". I even set it to only use "n" but still it shows the HP using "g". I updated the driver
(Atheros 22.214.171.124 for AR5B91), but it didn't help. I have "n" enabled in Atheros in Device manager.
Now I'm lost and can't think of anything else that can be a problem and / or how to fix it... I don't have any thick walls between the router and the HP, my iPhone seems to work in this room just fine...