My photoshop (cs3) just locked me out! I reinstalled it and it still won't load.
Have you tried resetting preferences? A reinstall will not effect this file.
Start PS and immediately hold down Shift Ctrl Alt keys (windows). You should get a reset window. A little tricky on timing.
To add to Curt's reply, if you're unable to get a hold of the key timings, follow the steps outlined here to reset your preferences: http://forums.adobe.com/thread/375776
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