- Software and digital services
- Operating system
0x800F0831
Windows 0x800F0831: component store is corrupted
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Medium
Quick answer
The update will not install because the Windows component store is corrupted. Repair it with DISM and SFC from a Command Prompt run as administrator, then restart before trying again.
Safety first
Stop and check this first
- Copy your important files before repairing the store or reinstalling: Microsoft asks for a backup of personal files before its troubleshooting steps.
Safe checks you can perform
- Repair with DISM and SFC
- Windows Update troubleshooter
- Clear the Windows Update cache
Leave these tasks to a qualified professional
- Do not attempt this professional task: Manual repair of the component store
- Do not attempt this professional task: Microsoft support with collected data
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Manual repair of the component store
What they doThe technician finds the damaged component in CBS.log and repairs it with the payload of the partially installed component or a repair source given to DISM.
They must show youthe CBS.log line naming the damaged component.
In writingwhich component was repaired, from which source, and the DISM result afterwards.
Microsoft support with collected data
What they doIf the repair does not work, a case is opened with Microsoft support including the data its deployment collection tool asks for.
They must show youthe collected data package and the failing KB.
In writingthe case number and the fix applied.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Repair with DISM and SFC
- Who:
- you, from a Command Prompt run as administrator.
- How:
- type Dism.exe /Online /Cleanup-Image /Restorehealth, wait for it to finish, type Sfc.exe /Scannow and restart the PC.
- Result that matters:
- whether DISM succeeds and the update installs after the restart.
- If it installs:
- the damaged store was the cause and is now repaired.
- If DISM ends in an error:
- the store needs a manual repair by a technician.
- Evidence to keep:
- screenshot of the final DISM and SFC messages.
Evidence: Common Windows Update errors
Windows Update troubleshooter
- Who:
- you.
- How:
- Start, Settings, System, Troubleshoot, Other troubleshooters, Windows Update, Run.
- Result that matters:
- whether it detects and fixes Windows Update problems.
- If it fixes something and the update goes in:
- there was also a Windows Update state problem.
- If it fixes nothing:
- the fault is still in the store.
- Evidence to keep:
- screenshot of the summary.
Evidence: Microsoft Windows Update troubleshooting
Clear the Windows Update cache
- Who:
- you, with an administrator account.
- How:
- stop the Windows Update service in services.msc, delete the contents of C:\Windows\SoftwareDistribution and start the service again.
- Result that matters:
- whether the freshly downloaded update installs after the DISM repair.
- If it installs:
- the download was corrupted too.
- If not:
- the case goes to the technician.
- Evidence to keep:
- time and result of the attempt.
Evidence: Microsoft Windows Update troubleshooting
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Software and digital services
- Brand
- Microsoft Windows
- Product type
- Operating system
Known code variants
- 0x800f0831
- 800F0831
- CBS_E_STORE_CORRUPTION
What it means
Microsoft defines 0x800F0831 as CBS_E_STORE_CORRUPTION: the Component Based Servicing (CBS) service finds the Windows component store damaged, the folder Windows uses to install and repair updates. The repair it documents is DISM with RestoreHealth followed by sfc /scannow, or a manual repair using the payload from the partially installed component. The code says the store is damaged, not why or which component.
Warnings and stop conditions
- Lowsource verified
Copy your important files before repairing the store or reinstalling: Microsoft asks for a backup of personal files before its troubleshooting steps.
Evidence: Microsoft Windows Update troubleshooting
Symptoms and causes
Probable causes · in order
- Partially installed componentCommon
Microsoft links this kind of damage to components left in a partial state; it is confirmed if DISM reports that it repaired the store.
Evidence: Common Windows Update errors
- Corrupted update cache as wellPossible
If DISM repairs but the update still fails, rule out a corrupted download too by clearing the cache.
Evidence: Microsoft Windows Update troubleshooting
- Damage DISM cannot repairPossible
You can tell because DISM ends with an error or no repair source; a technician then needs to do the manual repair.
Evidence: Common Windows Update errors
Virtual technician
Does 0x800F0831 still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Microsoft · 2026 · official_doc
- 2
Microsoft Windows Update troubleshooting
Microsoft · 2026 · official_doc
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