Question about A4tech KBS-21 (KBS21) Keyboard

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Driver problem? I've installed the keyboards media drivers, and right after the installation everything worked great, as soon as I restarted, all the media buttons fail to respnd. It displays the buttons window on the screen, but it won't affect any of the programs. What can I do? Hope you can help, thanks

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SOURCE: How can I get installation program for my A4Tech Optical mouse?

You can download your driver from A4Tech Here
Under "Downloads" select "***" and click "GO". On the right you will see links for the driver download.

Posted on Feb 19, 2009

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SOURCE: How can I active USB Port and Speaker port on the

click start control panel administrative tools computer management device manager scroll down universal serial bus controllers you could see a yellow question / exclamation mark? ! or a red X

you will need to update/reinstall drivers

right click to reinstall drivers

if you can see your usb drive but its not working

ports(com&lpt)right click update driver if this fails to fix the problem

check the USB leads that attach to the motherboard usually red white green black make sure they are securely seated and have no dust build up on them dust will cause static and a lot of unforeseen problems for a computer and its parts

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 scroll to sound video and game controllers you might see a yellow question exclamation mark? ! or a red X Right click to reinstall drivers
if you dont have a disk with the drivers you will have to download them
Click start control panel keyboard you can change your settings there
click start control panel administrative tools computer management device manager scroll to keyboard you could see a yellow/question exclamation mark? ! or a red X right click to install drivers

click start control panel keyboard hardware then properties you should see driver details and have options to,update driver,roll back driver,uninstall
if your computer came with a motherboard disc the drivers could be on it

hope this helps you

Posted on Oct 16, 2011

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- Please uninstall any driver you have for the keyboard
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Download the driver from Microsoft (link below)

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- Restart the computer to make sure driver is fully loaded.

Hope it works for you now.

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I have an Airis 740 Notebook Kira series model IL1. I have by mistake loaded a wrong keyboard driver. Now my keyboard is all mixed up. Where I can find the proper driver to solve this ? G?rard

Well go to My Computer and right click on it...
u get the computer properties
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The device manager opens, next find the keyboard wrongly installed and uninstall it first

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try going to the start menu and then run type in msconfig in the box and click the last tab at the top labeled startup check and see if the device description is in that list if so make sure it starts running on startup by checking the appropriate box. restart and valla.....
Hope this fix ya
dont forget to rate

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Detected before, but not after. Help me please,

Go to device manager and uninstall everything under the USB heading and restart your computer. This should reinstall all the drivers and hopefully reinstall your mouse. You may need to rerun the driver you downloaded for the mouse afterwards.

My next suggestion your be to try the mouse on another computer to make sure it is not defective.

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