PCLock



It blocks mouse and keyboard input. It blocks Task Manager and adds itself to autostart so it's immune to both Ctrl+Alt+Delete and hard reset.
There is a minor bug - for about 0.5 sec after Ctrl+Alt+Delete, it doesn't block anything. I don't think it's a big problem - you have too little time to do anything and there are some countermeasures.
Version 2.0.0.0 supports unlocking by inserting pendrive. You can configure this in included Setup program (you only have to specify your pendrive's letter and click two buttons).

I haven't tested it on Windows Vista/7 but I'm almost sure it will not work properly.

 Before using, run Setup.

Download:
EXE
Zipped source


Changelog:

Version number Date Changes
2.1.2.0a6.11.2009- changed executable name to lsass.exe - this way even if user somehow manages to open TaskManager, it can't be closed,
- added help button in setup application,
- as far as I remember, program itself is the same as before
2.1.2.012.05.2009- fixed problem with splash image positioning (now it should be compatibile with all resolutions, not only 1280x1024)
- improved readability of code - reduced number of GoSubs and Gotos (I know I shouldn't used them, but it's much easier with them)
2.1.0.06.05.2009- fixed major bug that would lock your PC without an easy unlocking method (changes are only in Setup applicaton)
2.0.0.0 25.04.2009 - added unlocking with pendrive
- you can set custom unlocking hotkey
...and probably some things I have forgotten about...
1.0.0.0 Who cares? Initial release

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