Windows’ September update breaks File History. The fix is a rollback
Microsoft confirmed a bug in Windows updates KB5124008 and KB5122878 is breaking File History backups on Windows 11 and 10. Many users who have installed the latest September security patches for Windows have found that the “File History” feature no longer works—deleted or corrupted files can no longer be recovered. File History automatically saves copies of files, allowing users to recover accidentally deleted or corrupted files using older versions that were stored hours, days, or weeks ago.
- ▪Microsoft confirmed a bug in Windows updates KB5124008 and KB5122878 is breaking File History backups on Windows 11 and 10.
- ▪Many users who have installed the latest September security patches for Windows have found that the “File History” feature no longer works—deleted or corrupted files can no longer be recovered.
- ▪File History automatically saves copies of files, allowing users to recover accidentally deleted or corrupted files using older versions that were stored hours, days, or weeks ago.
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| Original publisher | PCWorld |
| Canonical URL | https://www.pcworld.com/article/3241104/windows-september-update-breaks-file-history-the-fix-is-a-rollback.html |
| Publication time | Tue, 22 Sep 2026 13:29:23 +0000 |
| Retrieval time | 2026-09-22T13:33:51.146Z |
| Last seen | 2026-09-22T13:33:51.146Z |
| Headline source | Publisher (no WeSearch rewrite) |
| Excerpt source | publisher body |
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| Summary | WeSearch · cerebras-chat (WeSearch summarizer) |
| Summary source text | contentText |
| Citation coverage | Summary is a WeSearch-generated derivative; primary citation is the original publisher URL. |
| Cluster | SjFmYAwlLzLH · 1 stories |
| Cluster logic | Grouped by semantic title/content similarity across sources within a rolling window. Same-publisher template collisions are excluded from coverage comparison. |
| Ranking reason | Story pages are not engagement-ranked. Hub feeds use recency, with optional source-diversified chronological ordering (cap consecutive stories per source). No personalized ranking. |
| Publisher visit | Yes — open original |
| Substitutes article? | No — link-out required for full text |
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| Indexing | May the item be indexed (stored, ranked, made findable)? | Allowed |
| Snippet | May a short excerpt of the publisher's text be shown? | Allowed |
| AI summary | May WeSearch generate its own short summary of the article? | Limited |
| Retrieval / RAG | May the content be exposed for third-party retrieval-augmented generation? | Not asserted |
| Model training | May the content be used to train AI models? | Not asserted |
| Commercial reuse | May the content be reused commercially? | Not permitted |
Basis: Derived from the published RSS/Atom feed. Contact: [email protected]. Reviewed: 2026-07-24.
Opening excerpt (first ~120 words) tap to expand
Microsoft confirmed a bug in Windows updates KB5124008 and KB5122878 is breaking File History backups on Windows 11 and 10. Credit: Nwz / Shutterstock.com Summary created by Smart Answers AIIn summary:PCWorld reports that Microsoft’s September security update has introduced a bug breaking File History on both Windows 10 and 11, causing backups to fail entirely.Affected users may see incorrect “Reconnect your drive” error messages or find previously backed up files showing no available versions.Microsoft is working on a fix, but the only current solution is to uninstall the September update to restore backup functionality.
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Excerpt limited to ~120 words for fair-use compliance. The full article is at PCWorld.
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