The Windows Key Disabler is a small program, that runs in your systray.
You can right click the icon or use the following short cuts to deactivate keys:

[Strg]+[Shift]+[1] : Disable Left Windows Key
[Strg]+[Shift]+[2] : Disable Right Windows Key
[Strg]+[Shift]+[3] : Disable Alt+Tab

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Changelog:

1.0 Initial Release