Win7 system login QQ input correct password but prompt error how to do

First, the case of the problem
1, in the previous setting of the QQ password is used in lowercase, accidentally opened the uppercase on the keyboard, in this case Can log in;
2, just press the Caps Lock button, and then enter the password to log in.
Second, accidentally open the notebook's numeric keypad
1, in the 14-inch or less than 14-inch notebook, there will be a numeric keypad to open the function, when the numeric keypad is turned on, part of the letter input function will become Number;
2. At this time, if you originally entered the letter but entered the number, it is naturally wrong. If you close the numeric keyboard in your notebook, you usually find the Num Lock button, or the FN+Num Lock button. Enter the password.