Fast Speed Keyboad typing in my Window

Dear Expert,
Recenly I have reinstalled my Window XP notebook . and I find something it is different before using Window Vista.
When I do editing using my keyboard like I am writing this thread to you. I could not type too fast , otherwise
the edit cursor/point  will shift other line or other area.
For example,
If I type  in fast typing speed for the following sentence
" I am typing some word to EE exchange expert and please give me advice"
it will become
" I EE exchange expert and am typing some word to ...."
Until I stop any writing after the word of expert" and I need to correct those incorrect postion typing or editing

So everytime, I need to care my speed typing, No matter on what editor I am using also find similar problem like editing
in Notepad or Notepad++ etc... The keyboard cursor always shfit and I need to repostion to correct area or position if typing too fast
So now I will type it really slow to prevent those typing shfiting , And I also put a soft cover  under my mouse so that it won't
let the mouse easily to be moved or shift  when I typing too fast, it help a little bit but not completely.

What is wrong with my keyboard speed on my Window XP, Is there some setting on XP can ajust the keyboard speed and key sensitivity
Please advise

Duncan