Sticking keyboard/hanging computer

[emma_in_dream]

Any advice on why my Macbook keeps pausing/picking up text I have not highlighted/not putting down all the letters I type?

I see that this is a known problem with Macbooks but I see no advice on repairing it other than removing the keyboard cover if there has been liquid spilled on it (which there has not).

I have 15 gig of memory left so surely that is not the problem?

Any advice?

I am finding it very frustrating using the computer, as virtually every line has to be typed multiple times.