When the login screen appears, the keyboard language is change. I try to change back with windows + space default keyboard combo, but its not working. Every time that bug is occurs , i have to type with the on screen keyboard.
Go to the Control Panel, open the Language preferences, and then click Options. In the Input method section of the Language options, click Add an input method. Select your input method (QWERTY layout) in the list. You should now see the second input method in the Language options dialog box.