A full drive slows Windows down and blocks updates. The good news: Windows knows exactly what is taking the space, and its built-in tools can free it safely — no 'cleaner' apps needed.
Step 1: See where the space went
Open Settings → System → Storage. Windows shows a breakdown: apps, temporary files, pictures, videos and more. Start with the biggest category — that is where the easy wins are.
Step 2: Clear temporary files
In the same Storage page, open Temporary files. Tick items like Temporary files, Recycle Bin and Delivery Optimization files, then clean. Check the Downloads entry before ticking it — it may contain files you still want.
Step 3: Turn on Storage Sense
Storage Sense (on the Storage page) empties the recycle bin and clears temporary files automatically on a schedule. Switch it on once and the slow build-up of junk simply stops.
Step 4: Remove apps you do not use
Go to Settings → Apps → Installed apps and sort by size. Uninstall programs you genuinely do not use — especially old games and trials. If you are unsure what something is, leave it or search its name first.
Step 5: Move the big personal files
Videos and photo archives often take tens of gigabytes. Move them to an external drive or cloud storage (OneDrive, Google Photos) and keep only what you use regularly on the PC.
What not to do
- Do not delete files from C:\Windows or Program Files by hand — that breaks the system.
- Avoid third-party 'PC cleaner' apps; Windows' own tools do the job without the risks.
- Do not empty the Downloads folder blindly — check it first.
Ten minutes in the Storage settings usually frees several gigabytes and keeps the PC healthy. If your drive is still nearly full after this, a Digital Checkup can help you decide what to move or upgrade.