Quick answer: Free temporary files, Recycle Bin, update cleanup, and large personal files before retrying Windows Update.
Why this uses C drive space
Windows Update often needs extra working space beyond the final update size. Low disk space can cause repeated update failures.
Safe cleanup steps
- Free at least several gigabytes on C if possible.
- Clean temporary files and Recycle Bin.
- Move large downloads or videos to another drive.
- Restart and run Windows Update again.
- Use external storage only if Windows specifically offers that option.
What to avoid
Do not delete Windows system folders to force an update. That can make update repair harder.
How DiskTidy helps
DiskTidy can help you review temporary files, browser cache, cleanup candidates, and large files before deleting anything. It is designed for local, review-first cleanup instead of blind one-click deletion.