If your Windows 11 PC is feeling sluggish, cluttered, or simply a few GB short of the space you know should be free, a targeted cache cleanup can deliver a surprisingly large performance payoff — faster boots, snappier apps, and fewer odd errors caused by corrupted temporary data. Windows ships with multiple built-in tools to identify and remove cache and temporary files; when used correctly they’re safe, effective, and often reversible. This deep-dive explains what Windows caches, why they...