My iMac keyboard is lagging when I type. It is driving me crazy. How can I fix it?

My iMac keyboard is lagging when I type. It just recently started doing this and it is driving me crazy. Can someone please help, this is killing me!

Open System Preferences > Bluetooth
Select the keyboard then click - (minus) bottom left corner of the window.
Now, restart your Mac, then go back to the Bluetooth preferrence pane and click: Set Up New Device
If that doesn't help, go to /Library/Preferences
Move the com.apple.Bluetooth.plist file from the Preferences folder to the Trash.
See if that helped.

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BOILERPLATE TEXT:
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MacBook Pro (13-inch, Mid 2010) (Verified)
MacBook Pro - model: MacBookPro7,1
1 2.4 GHz Intel Core 2 Duo CPU: 2 cores
4 GB RAM
Video Information: ?
NVIDIA GeForce 320M - VRAM: 256 MB
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OCZ-AGILITY4 disk0 : (256.06 GB)
S.M.A.R.T. Status: Verified
EFI (disk0s1) <not mounted>: 209.7 MB
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Apple Inc. Built-in iSight
Apple Internal Memory Card Reader
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My iMac keyboard is lagging when I type. It is driving me crazy. How can I fix it?

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