GUIDE深度 · Deep dive
Which PC Cleanup Is Safe?
Safe cleanup only removes rebuildable temp files and caches; never delete Windows, Program Files, user documents, browser profiles or the registry. Close apps using those files first.
Safe to clean
%TEMP%, D3DSCache and thumbnail cache.
Recycle Bin after confirming nothing needs recovery.
Do not clean
Windows, Program Files and user documents.
Browser profiles and password vaults.
Unknown registry entries.
FAQ
Will cleanup speed up my PC?
It may free space; lag is more about startup apps, disk and RAM.
Should I clean daily?
No; Windows manages temp files automatically.