Mousepad and keyboard issues

While working online, my keyboard and mouse pad stopped functioning.  He computer seemed to be working, but I cannot work the mouse or keyboard.  Is there a reset for a frozen keyboard? 

Ok.
Reset the SMC (for MacBook, MacBook Pro and MacBook Air models with internal batteries):
1. shut down the MAC
2. Plug in the MacSafe adapter (i.e.power cord/charger)
3. PRESS AND HOLD SHIFT+CONTROL+OPTION+POWER buttons at the same time
4. Release all keys and buttons simultaneously
5. press the power button to turn on your mac as usual

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    read below
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