Two decades of reinstall rituals have taught a useful lesson: the reflex to wipe Windows and start over was once a reliable fix, but on modern PCs it’s often an expensive, time-consuming detour that can make problems worse rather than better. The old payoff — removing intrusive third‑party junk, restoring clean boot times, eliminating fragile drivers — has been blunted by changes in Windows, hardware, and vendor practices. At the same time, a full reinstall still has a place when a system is...