Empty the Recycle Bin
Delete temporary files from Settings > System > Storage > Temporary files
Run Disk Cleanup as administrator
Remove unused apps and programs
Uninstall large games you no longer use
Delete files from Downloads you no longer need
Move personal files to another drive or external storage
Move photos, videos, and documents to cloud storage
Clear browser cache and downloads
Delete old Windows Update files
Disable hibernation to remove the hiberfil.sys file
Reduce or move the page file if appropriate
Delete old restore points except the most recent one
Clean the Desktop of large files and shortcuts
Use Storage Sense to automate cleanup
Find and delete duplicate files
Remove leftover files from uninstalled software
Check AppData for large unnecessary files
Compress rarely used files or folders
Run a malware scan to remove unwanted files
Keep at least 10 to 20 percent of the drive free