Hey guys,
I've been having big problems with Wireless Logitech keyboards of late. I had an older (but top of the line with LCD screen etc.) wireless keyboard which would constantly disconnect. It had a few broken keys so I thought I'd solve the problem by buying a new k520r Logitech. However this has the same problems, random disconnects etc. which is really annoying while typing or copying and pasting etc. Each disconnection may last between 1-10 seconds and sometimes the key presses I made while it was disconnected all come through at once.

I've tried changing the batteries and different US ports. Any ideas? It also has a wireless mouse which uses the same dongle (came in combo) and works fine.

Using Windows 8.1 with Intel H67 CHipset and mouse plugged into USB ports. Keyboard and dongle are 50cm apart.