Help: Cursor jumps ramdonly

Could anyone help me on this problem: when I type in word, powerpoint, or emails, the cursor may jump around ramdonly. Sometime it may even automatically highlight a portion of text I typed and once I touch another key, the highlighted portion would be deleted!

I am using a DELL laptop.

Thanks, a lot.

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Copied from internet, hope it helps -NaCl- 給 NaCl 發送悄悄話 (1624 bytes) () 11/27/2007 postreply 20:20:38

Thanks. -nemo- 給 nemo 發送悄悄話 (0 bytes) () 11/28/2007 postreply 19:19:37

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