Hi Sportflyer,
I would suggest you to see the keyboard guide on how to open the battery case. Sculpt Ergonomic Desktop is built on advanced ergonomic principles, with a split keyboard layout that keeps wrists and forearms in a relaxed position, and a cushioned palm rest to provide wrist support. The domed keyboard shape works to reduce and correct wrist pronation that can cause pain and limited mobility.
http://www.microsoft.com/hardware/en-us/p/sculpt-ergonomic-desktop#overview
Also refer to the link: Troubleshooting: Keyboards
http://www.microsoft.com/hardware/en-us/help/support/troubleshooting/keyboard/wireless-bluetooth
Hope this helps. Let us know if you have any other issues with Windows in future.