When an update is ready to process, your computer has to open up some specialized valves to let the updates in. After this, the valves are supposed to close. Your computer’s valves might be faulty, and aren’t properly sealing in time, which allows the internal information to slowly drain out (this is what is referred to as a “memory leak”), eventually causing your PC to malfunction. When you finally install the updates, it initiates some basic checks and diagnostics, which get the valves to properly close, until the next update comes in.