Cursor jumping around while typing text

[den942]

I just got a lap top with Windows Vista installed on it. While I'm on line with Firefox, when I'm
typing text it suddenly changes the location where the text is being typed. Here is an example of what it does:

Instead of typing: The quick red fox jumped over the lazy dog.
It types this: The quick red the lazy dog...fox jumped over

Any ideas on a fix?

[HappyAndyK]

Does anything here help?
Mouse cursor jumps or moves randomly.