|You can also do the most basic of things.|
I also have a wireless keyboard and its been once or twice that my keyboard acts retarded.
Usually this means that the connection from the hub thats actually physically connected to your computer, and the keyboard itself, are getting a bad connection.
Its wireless and so, make sure you place that hub close or as close as you can to your keyboard.
Another thing, check the batteries in both units. One of them or both could have bad batteries.