C Drive Slimming Expert
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About this skill
Problem
Windows C drives often fill up with registry leftovers, dead services, temp files, developer caches, installers, and rarely used apps. Manual cleanup can delete system components, browser data, or files still in use.
How It Works
C Drive Slimming Expert scans six dimensions and reports risk before acting:
- Registry leftovers: checks HKLM, HKLM\WOW6432Node, and HKCU uninstall entries, plus known leftover keys
- Dead services: finds stopped services whose executables are missing
- System junk: covers Temp, SoftwareDistribution, thumbnails, and crash dumps
- Developer caches: detects npm, pip, pnpm, Maven, JetBrains, and Playwright folders
- Large files: lists files over 50MB in Downloads/Desktop, especially .exe and .msi
- Unused apps: sorts by EstimatedSize, filtering system components and common dev tools
Cleanup is interactive, preferring content-only deletion while keeping folders, then rescans to verify reclaimed space. PowerShell logic is written to .ps1 files to avoid escaping and timeout issues.
Boundaries
It targets Windows maintenance and does not delete C:\Windows\Installer, WinSxS, browser bookmarks/passwords, or system registry keys. Low-priority items such as Docker or Android SDK require confirmation that they are no longer needed.
Use Cases
- When a Windows C drive falls below 10%, identify temp files, Update caches, and large installers.
- Audit registry uninstall leftovers and stopped services with missing executables to decide what is safe to remove.
- On a dev machine, inspect npm, pip, Maven, and JetBrains caches, then clean only regenerable caches.
- List .exe/.msi installers over 50MB in Downloads with last access time for review before deletion.
Best For
- IT operations staff maintaining Windows workstations or servers who need to reclaim C drive space before alerts.
- Engineers managing dev environments who need to clear npm, pip, Maven, and browser caches while preserving configs.
- System administrators preparing machines for reimage or handover who need to verify leftovers and large installers.
- Technical support staff automating Windows cleanup who want reviewable recommendations instead of forced deletion.
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