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I'm looking for a keyboard locking software, so that my Windows environment (XP/Vista/7) looks the same (no login/locked screen), but keystrokes have no effect as any input, except for a predefined sequence of strokes (say "unlockme").

What I found so far is a non-free solution. Do you happen to know any free solution?

UPDATE: "looks the same" is a requirement since I'd like to know when I have new emails, or when a long-running task is done. Any login/locked screen hides such information. I'm not away, I'm still around, and so is my son (almost 4 years old!).

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Why is "looks the same" a requirement? I personally feel more comfortable with Win+L hiding my workspace while I'm away. –  grawity Sep 17 '10 at 20:45

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up vote 1 down vote accepted

I have no experience whatsoever with this program, but there's Kid-Key-Lock which purports to do what you want.

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