When you start Windows, the numberlock (sometimes called NUMLOCK or NMBLOCK) is not activated on your keyboard. So the number pad on the right is being used for scroll keys and cannot be used as a calculator.

When you need to use numbers you can either hold down the SHIFT key when using the pad. But with the following tweaks the system will boot with the number lock turned on.

1. navigate registry hives
• HKEY_USERS
• .DEFAULT
• Control Panel
2. enter new key, change key, or delete key
• data name: Keyboard
• data type: REG_SZ
• data value: 0 or 2 (see below)

  0 = NumLock off when you boot (default)

  2 = NumLock is On when you boot