Windows 7: Keyboard missing letters only while on internet

I have a fairly new Desktop computer (Dell) and within a few months the keyboard seemed to 'stick'. When I would type emails on hotmail, or post comments on facebook etc.. letters would constantly not show up, even though I was typing them.

I originally though the keyboard was the problem. I bought a new one. Still happened. Decided to try out a keyboard from an older computer (which had never had problems) and that one did the same. I've tried 3 different keyboards, all do the same thing.

I also notice that while typing on Word, I have absolutely no problems at all. Seems to be whenever I'm on the internet.



If anyone has any ideas of what might be causing the problem as well as a possible solution it would be greatly appreciated!!!

Thanks

My operating system is windows 7 64 bit

I have had that happen even here on these forums. It's like the keyboard strokes are faster than the internet connection. And I am a slow typer

Maybe there is a keyboard buffer that needs to be increased ? I remember that from DOS.

Update all your keyboard and nic drivers.
Go to device manager and look for any wanring, yellow, posters
Go to the website of your compter mfg and download all updates.