I am running vista 32 bit on a dell computer. i have just bought logitech ls21 speakers. i have plugged everything together but the speakers don't work. in control panel/sounds/playback it says i have no audio device installed.

First and foremost, did you test those speakers at the store before you bought them? There must be an ON/OFF switch somwhere on those speakers. Or maybe, the AC cable is defective or loose. Try unhooking it from your speakers then hook it back. Or did you forget to plug it in the wall electrical outlet?

defective check out backside membrane of speaker or better send it to service center

if your computer came with a motherboard disc the sound drivers could be on it
click start control panel administrive tools computer management device manager sound video and game controllers could be a yellow question mark? right click to re-install drivers
click start control panel sounds and audio volume advanced speakers make sure you have selected the
(((appropriate speakers))) also audio you will find 3 drop down lists make sure you have the correct settings there
cnetdowload.com if these drivers are not suitable on the home page you should see the download software finder under that there will be a list platform, category sub category price from the category drop down list select drivers then from the price drop down list select free or which ever applies to your need
http://download.cnet.com/Realtek-AC-97-Driver-Windows-98-Me-2000-XP-2003/3000-2120_4-10238712.html

http://download.cnet.com/Realtek-High-Definition-Audio-Codec-Windows-Vista-Windows-7-32-bit/3000-2120_4-10788600.html

http://download.cnet.com/Realtek-High-Definition-Audio-Codec-Windows-Vista-Windows-7-32-bit/3000-2120_4-10788600.html

http://www.freeware-downloads.com/soundmax_integrated_digital_audio_driver_v.htm
SoundMax Integrated Digital Audio Driver v hope one of these helps

Hi,
OS these days are usually set up for additional hardware like speakers. But you should check the settings for the speakers from your computer first. To find out if the settings is the culprit, you can plug your speakers into another music player to test it. If the same issue arises, you may have to bring it back for exchange.
Regards

If you go to logitech.com/support and type in the type of mouse you have they will give you downloads so you can choose the vista 32 bit software. Its nice software and the mouse should run fine.

try this link

http://logitech-en-amr.custhelp.com/ci/fattach/get/329407/

if that doesnt get you there just go to logitech.com and click on support and it will lead you to there

The set up should be as this.cable plugs into headphone jack on your pc. that connectects to your powerd subwoofer it is power correct! then your small speakers connect to the sub box or thew should? look on the sub box usually front and on the bottom.if thee actual speaker connections then they will be on the rear.

Sorry just doublechecked your board specs. Go to the sound properties in control panel. Click on the configure speakers option. If everything is plugged in right then windows should configure it for you to a 5.1 config. Hope this helps.

Same thing happened to me, only different model.

First, make sure you have the right drivers (and by that I mean 32-bit or 64-bit).

Go to control panel and remove your previous installation; reboot; reload the drivers with your All-In-One UNPLUGGED until they tell you to plug it in.

That was the trick that worked for me. Good Luck.