Empty the Recycle Bin
Delete temporary files
Uninstall unused programs
Remove large files you no longer need
Clear Downloads folder
Delete duplicate files
Move files to an external drive
Move files to cloud storage
Use Disk Cleanup
Use Storage Sense
Clear browser cache
Delete old restore points
Disable hibernation if not needed
Remove unused user accounts
Clean up desktop files
Check for large hidden files
Delete old Windows update files
Compress files and folders
Move games and apps to another drive
Scan for and remove malware
Empty app caches
Remove old backups
Clean up system restore usage
Review and delete large videos and photos