OK. It appears to be a MosArt Semi (Taiwan) Keyboard/Mouse combo. Operates in the 2.4GHz ISM band (same as some cell phones, wifi, bluetooth, radar, and microwave ovens). Could still be interference.
There is really nothing to tweak in the OS. The wireless keyboard becomes a standard USB HID (Human Interface Device) and is handled by generic HID drivers.
You may want to see this:
djb