Posted July 3, 200717 yr I am using XP Pro SP2 with all updates. I have the Powertoy "Calculator Plus" installed. It worked fine. I installed a Microsoft Natural Ergonomic Keyboard 4000 and now the calculator will work and then just stop working. In other words, I will start performing calculations and then it will quit responding to keystrokes or mouse clicks. I don't know that this is related to the keyboard but Any ideas? The standard calculator with Windows still works fine. Bob
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