Vista - wireless lan driver problem

my brother have acer aspire 4720z . he was using a wired internet for all this time but now he want to use the internet wirelessly all the drivers are loading without any problem. but in wireless lan the listed three options are given in drivers cd.
Atheros Wireless LAN Driver v7.2.0.215
Broadcom Wireless Driver v4.102.28.4
Intel Wireless Driver v11.1.0.86

and in device manager it shows Atheros Wireless LAN Driver v7.2.0.215 but some 5.0.somehing version in device manager with yellow exclamation. and evenry time i try to install the driver again it says unable to start the hardware or plug in the wireless card and click next. and it worked once when i installed it but after reebot its off again. any suggestions dont want to do OSRI

How are you trying to install the drivers? give us the blow by blow of what you are doing

using the drivers cd and tried installing it from cd setup ... installed everything but not that Atheros Wireless LAN Driver v7.2.0.215 ... it shows that name with yellow exclamation in device manager ... the touch buttons shows wireless enabled on screen. still no go

I would try to go to the Atheros site and download their latest driver for your card and OS there. CD's are known to have old drivers that while they may work well, they may not work well when combined with newer software or applications. Make sure you download to a folder you can get into later on.

After getting the new driver version, I would go to device manager>yellow "!">driver tab>Update Driver and find the new driver you just downloaded and install from there.

If this doesn't work, reboot, go to the downloaded driver folder, Uncompress if Zip or Rar file, right click on the .exe file and then, click on "Run as Administrator".

Hopefully, one of these two methods can get you going, if not, come back to tell us what happens and hopefully, I can lend a hand or others more experienced members can lend a hand.

Windows 7 provides a generic Wireless USB LAN driver.

Select "Locate and install a driver manually" from the "Update Driver" button from the Driver Properties in Device Manager

This worked for my Linksys USB wireless Adapter in Windows 7 64bit.

i am getting code 39 and i tried downloading latest driver from the website of acer and atheron both but no go same problem. code 39 and hardware cannot be started but i know hardware is working it worked 2 out of 20 times. and then stopped again as soon as i restart.