Help Center
How do I free up disk space?
Running out of disk space is stressful and can slow your PC to a crawl. The solution is not guessing what to delete but systematically identifying what is safe to remove and what must stay.
問題 · THE PROBLEM
Running out of disk space
Your drive is nearly full and you do not know what to remove. Every folder looks important, and deleting the wrong thing could break Windows. You need a systematic approach that targets the biggest space consumers first while keeping your system safe.
Unclear priorities Risk of wrong deletions No systematic approach
原因 · COMMON CAUSES
- Years of accumulated temporary files
- Old Windows Update rollback data
- Browser caches and download folders
- Duplicate files across folders
- Large applications no longer in use
ソリューション · HOW TO FIX IT
Reclaim space systematically
Scan First
Identify the largest folders and files consuming your drive.
01
Prioritize
Focus on the biggest space consumers that are not system-critical.
02
Clean Safe
Remove temporary files, caches, and old downloads with confidence.
03
Prevent Buildup
Set up storage sensors and periodic cleanup to stay ahead.
04
警告 · WHAT NOT TO DELETE
Never delete these without guidance
System32 folder
WinSxS folder contents
Pagefile.sys
Hiberfil.sys
Windows folder root
Program Files root
よくある質問 · FAQ
Frequently asked questions
Run Disk Cleanup and clear temporary files, Recycle Bin, and old Windows Update files. For a deeper clean, use ClearKun to identify the largest folders and files consuming space.
Keep at least 15-20% of your C drive free. Below 10%, Windows may slow down, updates may fail, and virtual memory operations can become unreliable.
No. Disk Cleanup removes temporary files and system files you select, but it does not touch personal files, applications, or important system components. Always review what will be deleted before confirming.
Yes. You can uninstall and reinstall applications on a different drive, or use Windows Settings to move some UWP apps. For most desktop applications, you need to reinstall them manually.
Yes, but you should do it through Disk Cleanup or by stopping the Windows Update service first. Manually deleting files while updates are running can cause installation failures.
Storage sensors can auto-delete temp files and recycle bin contents after a set period. This is safe for most users but should be reviewed to ensure important files are not accidentally removed.
早期アクセスに参加する
Let ClearKun prioritize your cleanup
Stop guessing what is safe to delete. ClearKun scans your PC and explains every large file in plain language.