Find what is using the system drive
Open Settings → System → Storage and let Windows calculate the categories. Cleanup recommendations can show temporary files, large or unused files, cloud-synced items, and unused apps; the amount shown is an estimate until you choose items.
- Review Temporary files and leave Downloads unchecked unless you have inspected that folder.
- Use Storage Sense or Cleanup recommendations and read each category label before confirming.
- Move personal videos or archives to another drive only after verifying the copy opens.
- If Setup offers external storage for a feature update, follow the on-screen instructions.
Do not remove rollback or servicing files blindly
Deleting Previous Windows installation(s) can remove the option to roll back after an upgrade; Microsoft notes that this cannot be undone after the files are removed. Do not manually delete WinSxS, Windows Installer, or other protected system folders—use Windows' own cleanup controls and keep a separate backup of personal files.
Questions and Answers
How many gigabytes does a Windows update need?
There is no reliable single number for every PC and update. Use the space estimate Windows shows for that update and the Storage settings on your device.
Can I delete Windows.old to make the update fit?
Only if you accept losing the built-in rollback option to the previous Windows installation. Review Microsoft's warning before removing it.
Know what is included before you buy.
The one-time 30-minute trial covers core tools. PRO-labelled features stay locked until a paid license is activated.
Read next
Write to us: [email protected]