
Verify that the Shift key is not pressed.

Verify the configuration of your keyboard (QWERTY, QWERTZ, AZERTY, and so on).

Restart the computer while holding down Command-R until the Apple logo appears. Select Disk Utility in the OS X Utilities window, and click the Continue button. Select your startup disk, and click the Repair Disk button. When done, click the Repair Disk Permissions button. Then restart normally, reopen OnyX, and try again...