A Windows Update failure is frustrating partly because the error messages rarely explain what actually went wrong. The update either hangs, rolls back, or throws an error code, and the system offers nothing useful about the cause.
An uninterruptible power supply (UPS) is the kind of equipment that gets purchased, installed, and then forgotten about until something goes wrong. The problem with that approach is that UPS batteries degrade, their runtimes shrink, and the workloads connected to them grow over time, often without anyone updating the protection strategy to match.