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Windows Update · scoped error record
0x800F0831

Windows Update error 0x800F0831: CBS store corruption

Microsoft classifies 0x800F0831 as CBS_E_STORE_CORRUPTION and directs troubleshooting toward component-store repair.

Applies to: Windows 11 Windows Update/servicing contextReviewed: 2026-09-17

What it means in this context

Microsoft’s common Windows Update error guidance lists 0x800F0831 as CBS_E_STORE_CORRUPTION. The useful scope is servicing/component-store repair, not a generic “clear every cache” recipe.

Start here
  1. Record the failing update and the exact error.
  2. Run the Windows Update troubleshooter.
  3. Restart Windows and retry.
  4. Use DISM/SFC if the error persists.
1

Run DISM RestoreHealth

Medium risk

Why: Microsoft lists component-store repair as the mitigation for this CBS error.

  1. Open Terminal or Command Prompt as administrator.
  2. Run DISM RestoreHealth and wait for completion.
DISM.exe /Online /Cleanup-Image /RestoreHealth
2

Run SFC and restart

Medium risk

Why: SFC checks protected system files after the component image is repaired.

  1. Run SFC after DISM.
  2. Restart the device.
  3. Retry Windows Update.
sfc /scannow
Scope boundary

When not to use this record

Do not keep repeating DISM indefinitely if it reports a new source, disk or access error; branch to that error instead.

If it persists

If the repair commands succeed but the same update still fails, collect the KB number and servicing logs before escalating.

Evidence

Reviewed source

Related authority records

Continue with the same failing system

These links share the same component or repair context; they are not generic keyword suggestions.

Error0x80070002 — Windows Update error 0x80070002: what it means and what to try first

Microsoft groups 0x80070002 among update install failures; preserve the context before using broader repair steps.

Error0x80073712 — Windows Update error 0x80073712: component store inconsistent

Microsoft maps 0x80073712 to ERROR_SXS_COMPONENT_STORE_CORRUPT in the Windows servicing context.

Error0x800F081F — Windows Update error 0x800F081F: repair source missing

In Microsoft’s servicing guidance, 0x800F081F maps to CBS_E_SOURCE_MISSING and calls for component-store repair or a valid matching source.

GuideWindows 11 update not installing: troubleshoot from simple checks to repair tools

A conservative sequence for Windows Update failures before resetting update components.

GuideWindows Update component-store corruption: DISM and SFC repair path

Use this path for servicing errors such as 0x800F081F, 0x800F0831 and 0x80073712 when component-store repair is relevant.

Windows updateKB5120998 — August 27, 2026 Windows 11 preview update

An optional preview cumulative update that later appeared in release-health history for desktop-background and mouse-personalization regressions on affected systems.