[jon-wood]

I've had issues with a non-bluetooth wireless keyboard when plugging the receiver into my laptop directly which go away when it's connected via a USB hub a little distance away, which makes me think the laptop itself is causing interference.

[FireBeyond]

I do similar. I have my dock which has a USB extension cable that runs under the underside of my desk and basically sits directly underneath the mouse and keyboard. Connectivity issues vanished.