[Japanese Keyboard WinXP]

I signed up to say thanks! I was going nutss with this problem.

I have Vista Ultimate on a Japanese Lenovo Thinkpad x61 tablet. Suddenly Vista stopped recognizing the Japanese keyboard, maybe after a Lenvo software update (not sure exactly). After struggling with the usual solutions, this fixed it.

I also found a MS KB article that has more details and options: Windows Vista may not use the correct keyboard layout, which lists these values:

LayerDriverJPN               REG_SZ   kbd106.dll  
OverrideKeyboardIdentifier   REG_SZ   PCAT_106KEY  
OverrideKeyboardSubtype     DWORD    2 
OverrideKeyboardType         DWORD    7