The Num-Lock key on your keyboard toggles the behavior of the number pad keys. When it is active they are used for numeric input; otherwise their alternate function is effected. By default the Num-Lock feature is deactivated when Windows starts. Edit the Windows registry to change this behavior so that the Num-Lock feature is enabled each time you start up your computer.
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Click the Start Menu, and type "regedit," then press Enter. Click "Yes" if prompted to give the Registry Editor permission to change the registry.
Double click the "HKEY_USERS" folder in the lefthand pane to expand it. Expand ".DEFAULT," expand "Control Panel," and click "Keyboard."
Double click the "InitialKeyboardIndicators" registry key in the righthand pane. Input "2" in the "Value data" field, and click "OK."
Restart your computer. Num-Lock is on when your computer starts up.