WRT54GS v7 loses wireless connectivity after 15 minutes or so

I just installed a WRT54GS v7 router to work with my cable modem. It has the latest firmware. The wireless connection seems to work for about 15 minutes or so at a time and then it stops working. I can't even get to 192.168.1.1. The only way to get it to work is unplug the router and plug it back in. Originally, I thought it was interference from my 2.8GHz cordless phone, so I unpluged it. But that still didn't fix the problem. What could be the problem? Thanks.

@mallinj
Hi,
Disconnect from Internet.
Uninstall from Your system audio drivers.
Resources:
Uninstalling Software in Windows 7
Uninstall or change a program in Windows 7
Restart Your system:
On boot press ' F8 ' and choose ' Safe mode '.
Go to Control Panel -> Devices Manager -> Network Cards
and find there Athero Wireless card. Click on it with right button of Your mouse and choose uninstall driver.
Restart Your system and this time start it in normally.
Install latest driver:
Atheros Wireless here (ver 8.0.0.238   for 32/64 bit Win7)
** Say thanks by clicking the "Thumb up" icon which is on the left. **
** Make it easier for other people to find solutions, by marking my answer with "Accept as Solution" if it solves your issue. **

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