Hi my name is ***** ***** I will be the expert working with you today to help and resolve the problem you have posted.
I am sorry to know that you are facing problem with your wireless keyboard and mouse pairing.
To connect the wireless mouse and keyboard you need to follow few steps carefully
connect the receiver to the usb port and then make sure the batteries are good in the keyboard as well as the wireless mouse then all you need to follow it few steps.
Press the connect button on the receiver first and withing 12 seconds press the connect button on the bottom of the mouse and the keyboard then it will be synchronized with each other.
if you can tell me the make and model of the keyboard and mouse i can tell you the exact location of the reset button.
allow me few mins i am working on it.
please restart the computer by holding down the power button
once back on try the steps
ok..with the other mouse did you try the steps i gave?
i will opt out so that my fellow experts may advice
1. Shut down the computer. 2. Unplug the computer's power cord. 3. Wait fifteen seconds. 4. Attach the computer's power cord. 5. Wait five seconds, then press the power button to turn on the computer. 6. Press and hold the Command-Option-P-R keys before the gray screen appears. 7. Hold the keys down until the computer restarts again at least twice. 8. Release the keys.