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What can I safely delete?
Deleting the wrong file can break Windows. The right files can free up gigabytes instantly. Learn a simple framework for deciding what stays and what goes on your PC.
問題 · THE PROBLEM
Deleting blindly risks your PC
You want to free space, but every folder looks important. System32 has files with cryptic names. AppData contains folders for apps you barely remember installing. The line between safe and dangerous is blurry, and one wrong deletion can cause problems.
Unclear file purposes Risk of system damage Hidden important files
原因 · COMMON CAUSES
- No clear labels on system files and folders
- AppData grows silently with unknown caches
- Old downloads accumulate without review
- Temporary files never auto-cleaned
- Multiple versions of the same installer saved
ソリューション · HOW TO FIX IT
Delete confidently
Identify
Scan your drive to see every large file and what it actually is.
01
Classify
Each file gets a safe-or-danger label so you know exactly what to touch.
02
Review Carefully
ClearKun flags protected system files so you never accidentally delete them.
03
Clean Up
Remove only the safe items and watch your free space grow immediately.
04
警告 · WHAT NOT TO DELETE
Never delete these without guidance
System32 folder
WinSxS folder contents
Pagefile.sys
Hiberfil.sys
Windows folder root
Drivers folder root
よくある質問 · FAQ
Frequently asked questions
Most temporary files, browser caches, old downloads, and Recycle Bin contents are safe. Avoid deleting anything inside System32, WinSxS, or Program Files unless you are certain of its purpose.
Yes, most files in C:\Users\YourName\AppData\Local\Temp are safe to delete. However, if a file is currently in use by an application, Windows will block deletion. Use Disk Cleanup or ClearKun for a safer approach.
You can safely remove old Windows Update cleanup files through Disk Cleanup or the Settings app. Never manually delete files in C:\Windows\SoftwareDistribution without using the built-in tools.
Deleting critical system files can cause crashes, boot failures, or missing functionality. Always verify what a file is before removing it, and use trusted utilities that flag system files as protected.
Check the file location, file extension, and last modified date. ClearKun explains each large file in plain language so you can make an informed decision before deleting anything.
Old installer files (.exe, .msi) from software you no longer use are generally safe to delete. However, keep installers for software you might need to reinstall without redownloading.
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.