Hi,
Thank you for contacting Microsoft Community.
I understand that you are facing the issue on wireless keyboard.
I will certainly help you with this.
I would like to inform you that you may need to download and reinstall the driver and check if it helps.
I would suggest you to go through the below links:
Install mouse and IntelliPoint software
https://support.microsoft.com/en-us/kb/258785
Troubleshoot a wireless mouse that does not function correctly
https://support.microsoft.com/en-us/kb/321122
I hope this helps. Please post back with the status of the issue and we will be glad to assist you further.