VAIO VGNCS190 KEYBOARD NOT TYPING EASILY, I HAVE TO PRESS THE BUTTONS SEVERAL TIMES, HELLP =)

Cheap keyboards are not built to last. If you want a long lasting keyboard get a good mechanical one. They may cost a little more up front but you wont need to replace it for a long time.
Mechanical Keyboards for Clicking Tactile Typing Feel

CAN YOU PUT A PICTURE OF YOUR KEYBOARD.

You can opt for the following typing speed test which is free, fast to pass and rather simple. I used to pass it several times and the result was pretty much the same which I guess means that it's valid.

Press SHIFT then CTRL once.

Now try typing and see if it works properly.

If not then press SHIFT then ALT once.

Try typing again and see if that works.

Good luck.

That key on the keyboard is stuck. If you can't unstuck it you will have to replace the entire keyboard.

Keep the palms of your hands away from the "touchpad" -- you're accidentally moving the mouse-pointer as your fingers press on the keys.

Press F5 then wait three seconds and press F8. This will enter cursor mode and then you go to Start>Control Panel and then smack the tar out of your "Home and Insert" Keys. They have bad contacts. Flip the keyboard or laptop over and tighten all of the phillips head scres in that area and in general (on a laptop the keyboard screws are labelled with a "K" imprinted in the plastic next to the screw holes. Best of luck and definitely blow it out with airduster or a small vacuum.

The batteries inside the keyboard need replacing.

--and / or--

The wireless keyboard "receiver" is obstructed or too far away from the keyboard.

Hope this helps!

maybe its keyboard problem ,some keys on ur keyboard.open a new text document and test all the keys of keyborad if any type more than 1 times when u push u have to clean under that key .

Sounds like your keyboard needs a clean and some new batteries.