I'm using four input languages: English, Japanese, Chinese and Greek. I'm used to having them on Left ALT+Shift+1, ...+2, ...+3 and ...+4, respectively. But on my Windows 7 computers, Alt+shift+1 and +4 keep resetting themselves after a reboot.
I've also got my internet browser set to Ctrl+Alt+I (Right Alt+I), but this one also disappears after a reboot.
How can I fix this.