OK, not the cause of your particular problem, but will help your Mac run smoother...
Delete these files & restart...
/Library/LaunchAgents/com.epson.esua.launcher.plist
~/Library/LaunchAgents/com.adobe.ARM.***.plist
~ tilde indicates your home folder
Apple hid the Users' Library folders...
Method 1:
1 From the Finder, select the Go menu at top of the screen, and choose Go to Folder.
2 In the window that opens, enter ~/Library, and click Go.
I'd try another KB with your new info...
Wired Keyboard & Mouse Combos | Staples