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The keyboard on my Dell Inspiron 531 DT keeps losing focus. It does it when in any program so is not program specific. I have checked I have up to date drivers and done a Dell diagnostic check but still it continues. Seems to be getting worse and happens more frequently.

I find if I press the Esc, Num Lock or Caps Lock keys it often clears the problem but not always. Often I have to close down the program I'm working in. The mouse continues to operate okay even when the keyboard isn't. Is is connected via a USB to the desktop PC.

Anyone have any ideas on how to solve this annoying problem? Is the keyboard wearing out or is there some other problem.

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