Keyboard lock-ups on an IBM ThinkPad running Windows 7 can occur intermittently during typing, with the mouse remaining functional. Restarting the computer temporarily resolves the issue. Possible causes include stuck keys, particularly the Ctrl or Alt keys, and the potential activation of "sticky keys," which may prevent keyboard input. Users are advised to check the keyboard driver through the device controller and consider cleaning the keyboard to remove debris. While some suggest using WD40 for cleaning, it is strongly discouraged due to the risk of damaging the keyboard's plastic components. If using a Bluetooth keyboard, low battery levels could also be a factor.