Cleanup actions are one-shot — click Run instead of toggling. Use Clean all to run every cleanup and see how many MB were freed.
| Action | Tier | What it clears |
|---|---|---|
| Temporary files | Free | %TEMP% and C:\Windows\Temp |
| Prefetch | Free | C:\Windows\Prefetch |
| Thumbnail cache | Free | Explorer thumbcache databases |
| Recycle Bin | Free | Recycle Bin contents |
| DNS cache | Free | DNS resolver cache (ipconfig /flushdns) |
| Windows Update cache | Pro | SoftwareDistribution\Download |
| Delivery Optimization files | Pro | Delivery Optimization cache |
How often
Run temp and DNS cleanup monthly. Prefetch regenerates automatically — safe to clear occasionally.