Keyboard lags my keyboard is samsung SDK3500 : suddenly it stops working for seconds in middle of work,, sometimes it does n't work even after restarting the pc . also i dont have the cd for installation of driver, so please suggest me a website for downloading it for free. thank you.

Have you tried changing the batteries? Also, you may have to re-sync the keyboard with the receiver.

Battery is getting weak or you have some dust/lint on the optical sensor.

my "new" rechargeable batteries were DOA,
just use regular batteries
i have a different prob too
shift and windows key on that keyboard does not work for me
looking for solution maybe drivers...

What's the brand of your typewriter? You might have a contact defect on the return key.Normally, the keyboard has to be opened and clean the contacts.

The lag you're experiencing most likely isn't the result of any physical abnormality, but rather you're network. How many people in your household share the same network? The more people on a network, the slower it will run. (I've actually experience this first hand) You might have too much people sharing your network for your game to run smoothly. Try to go on hours that everyone is not on. As for the repeated starts and stops, during game play, don't stress that. Its normal.

try to clea the Disk that you are using then try also to insert other disk that is working to check if the problem is the disk itself. Only then if the result is the same then the problem would be either the Player hardware or the Support software maybe its corructed or not compatible to the disk you want to insert. Then if the hardware has a problem contact the PS3 repairshop in your place. But if the support software has the problem then you can update it or reinstall your software support in your PS3.
Hope it helps your problem.  If you need more assistance just conatc me or reply to this post.  Thanks you

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http://www.columbia.edu/~em36/wpdos/eurodos.html

Sounds like your keyboard is either not connected securely or it is faulty.

Sounds like it might be a power supply issue. Unless it is mains powered.

Try removing all other USB devised. If that doesn't work its worth try a Mains Powered USB hub.

Check all connections to PC.
If you have a CD reinstall the software for the keyboard.
Update driver.