Try this:
http://www.ehow.com/how_6787620_unlock-touchpad-laptops.html
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I WAS TYPING AND MY HAND WAS OVER THE TOUCHPAD MOUSE PART WAY THE A SMALL BOX POPPED UP WITH A SIGN SHOWING DO NOT TOUCH, I MOVED MY HAND AND AN ORANGE SMALL LIGHT IS NOW LITE UP ON THE TOP LEFT CORNER OF THE TOUCH PAD.
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Answer accepted by question author
Answer accepted by question author
korikennedy,
On my Dell L501x, there is a button on the keyboad between the F12 key and the Insert key. If pressed, it mocks and unlocks the keyboard. When locked, an orange light appears above the touchpad.
Rick
Press f9
HTH