I have a Microsoft Wireless Entertainment Keyboard 7000 with Microsoft Wireless Laser Mouse 8000 which work on Bluetooth. Both of them were working properly. I did not use the computer for some time and when I started using it I found the keyboard and the mouse not working. Therefore I changed their batteries with fresh ones , the mouse uses a rechargable battery the keyboard uses normal alkaline batteries. The mouse started working properly but not the Keyboard. I checked the batteries with a multitester and the batteries are fine.The keyboard is recognizable by computer it is shown under the keyboard portfolio but none of its keys function. I tried connecting the keyboard to an another computer with the same result. It recognizes the new hardware Microsoft Wireless Entertainment Keyboard 7000 and installs the software for it but none of the keys of the keyboard function. Could anyone suggest how the Keyboard will work , moreover it is not a cheap keyboard. I am using Windows Seven Ultimate.