Windows: Disable Hot Key Ctrl+Space

1. Go to Start > Type in regedit and start it
2. Navigate to HKEY_CURRENT_USER/Control Panel/Input Method/Hot Keys
3. Select the key named:
   • 00000070 for the Chinese (Traditional) IME - Ime/NonIme Toggle hotkey
   • 00000010 for the Chinese (Simplified) IME - Ime/NonIme Toggle hotkey
4. In the right sub-window, there are three subkeys.Change the first byte in Key Modifiers from 02 to 00
   • Key Modifiers designate Alt/Ctrl/Shift/etc and is set to Ctrl (02c00000).
   • Virtual Key designates the finishing key and is set to Space (20000000).
6. Change the first byte in Virtual Key from 20 to FF
7. Log off and log back on. I don't think it's necessary to restart.
8. Do not change the Hot keys for input languages in Control Panel, unless you want to do this all over again.

 

https://superuser.com/questions/363873/how-to-disable-ctrl-space-selecting-chinese-keyboard-on-windows-7