Your concern is justified.
Do not start the repair reinstall until we know how much free space remains on C:.
The option
“Reinstall your current version of Windows to repair files and components” is not a factory reset. It reinstalls the same Windows version while preserving applications, personal files, and settings. However, it must download and temporarily store substantial installation data.
Check free space first
Since you prefer Command Prompt, enter:
dir C:\
The final line will show:
________ bytes free
Alternatively, open
File Explorer > This PC and look beneath drive
C:.
I would want
at least 20 GB free, preferably
25 GB or more, before attempting the repair reinstall. The exact requirement varies, but starting with only a few gigabytes free is unwise.
Before using the repair reinstall
- Empty Recycle Bin if you have not already done so.
- Restart Windows.
- Run:
DISM.exe /Online /Cleanup-Image /AnalyzeComponentStore
- Post the final analysis results.
- Open Settings > Windows Update > Update history.
- Find the failed update and provide its KB number, name, and error code.
- Retry Check for updates once, because DISM and SFC have now repaired the previous corruption.
If the update still fails and
C: has sufficient free space, the repair reinstall is a reasonable next step.
Back up important files first, keep the computer connected to power and the internet, and do not interrupt it.
Please post the number of bytes free—or the easier GB figure—plus the failed update’s error code before starting it.