Empty temporary files
Open Windows Settings, go to System, Storage, Temporary files, then review and remove items you understand.
Do not delete Downloads unless you have reviewed every file.
Manual cleanup guide.
Use this checklist if you want to clean Windows manually. It avoids registry editing and focuses on reversible, low-risk cleanup steps.
Clear browser cache
Use each browser's built-in clear browsing data screen. Cache is usually safe to remove; saved passwords and autofill data should stay unchecked unless intentional.
Review startup apps
Open Task Manager, choose Startup apps, then disable nonessential apps like chat, music, or game launchers you do not need at boot.
Empty Recycle Bin
Open Recycle Bin, review important files, then empty it only when you are sure nothing needs to be restored.
Find large files
Check Videos, Downloads, Desktop, and old installer folders for large files you no longer need. Move important archives to external storage before deleting.
What not to delete
Do not manually delete files from C:\Windows, System32, driver folders, or application install folders unless you know exactly what they are.
Use SystemCleaner for guided cleanup
SystemCleaner gives you a clearer view of large files, startup apps, duplicate candidates, and cleanup targets before you remove anything.