Computer acting strangely

[runbunch]

When I type something  there is a delay before the letters  appear. For instance, I'll type a few letters of a word, and then, the last few letters will not appear for a quarter second or so, and then they jump on the screen.   The computer seems to be acting erratic in other ways also. The scroll button seems to have a mind of it's own.

[zeroburn]

Question: is this a laptop or is this a desktop?

the letters not appearing for a bit, can be normal in windows, and just about every other operating system when the system has a large load on it.

And a proposed solution to your scrolling issue: If it is a laptop, then most often then not on the newer models, the touchpad will have scroll areas on the sides to aid in scrolling. Maybe you are just accidentally contacting this with your skin when you type.