This article was previously published under Q282764
After you upgrade a computer that uses a Japanese PS/2 Keyboard (106/109 Key) keyboard to Microsoft Windows XP or to Windows Vista, Device Manager indicates that the keyboard is a Standard 101/102-Key keyboard or a Microsoft Natural PS/2 keyboard. The keyboard functions as a 106 key keyboard but appears in Device Manager as a 101 key keyboard.
This issue occurs because Plug and Play cannot detect the type of a keyboard that a user manually installs. Therefore, almost all PS/2 keyboards appear in Device Manager as Standard 101/102-Key keyboards or as Microsoft Natural PS/2 keyboards.
To work around this issue, use the Keyboard item in Control Panel to reinstall the Japanese PS/2 Keyboard (106/109 Key) keyboard.
Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.
Windows Vista Home Basic, Windows Vista Home Premium, Windows Vista Ultimate, Windows Vista Business, Windows Vista Enterprise, Windows Vista Starter, Microsoft Windows XP Home Edition, Microsoft Windows XP Professional