I'm using the "On screen keyboard" to write this. The letters e, d, c, t and b aren't typing. I cleaned it out and it's 100% clean. I reinstalled the disk that it came with and tried moving the receiver around. I changed the batteries and that doesn't help either. It's a keyboard from Dynex and it came with a wireless mouse but I threw it away but that's not what is causing this problem. The keyboard has been like this 2 months after I got it.