smbv1 netbios

About this tag
The smbv1 netbios tag covers discussions about SMBv1 file-sharing connectivity issues over NetBIOS (NetBT) in Windows 10 and Windows 11 updates. Recent threads highlight regressions introduced in September 2025 cumulative updates, including KB5065426, KB5068221, and preview builds like KB5066198 and Build 27954. These updates broke SMBv1/NetBIOS connections, affecting legacy NAS devices and older file-sharing setups. Microsoft has acknowledged the problem and provided workarounds, but the issue persists across multiple Windows versions, including 24H2 and Insider channels. Administrators relying on SMBv1 should review these regressions and apply available fixes or workarounds before deploying updates.

  1. Windows 11 KB5065793 Insider Update: Taskbar Fixes and SMBv1 Issues

    Microsoft has quietly shipped a small but important Insider update — Windows 11 KB5065793 (Build 26220.6760 / 26120.6760) — that stitches up a raft of annoying user-facing bugs and developer headaches, from taskbar and system tray oddities to SMBv1 file-sharing problems and PIX GPU‑capture...
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    • file explorer pix gpu capture smbv1 netbios windows insider
    • Replies: 0
    • Forum: Windows News

  2. Windows 10 KB5066198 Release Preview: Fixes SMBv1 NetBIOS and Autopilot ESP

    Microsoft has quietly shipped a final Release Preview update for Windows 10 — labeled KB5066198 and appearing as builds in the 19045.* series — that patches a duo of high‑impact regressions introduced earlier in September while Microsoft’s desktop OS approaches its October 14, 2025...
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    • autopilot autopilot enrollment status page kb5066198 kb5066198 release preview smbv1 netbios windows 10 windows 10 end of support
    • Replies: 1
    • Forum: Windows News

  3. Windows 11 Canary Build 27954 Restores SMBv1 NetBIOS and Arm64 PIX Issues

    Microsoft’s latest Canary‑channel flight for Windows 11 lands as a focused repair patch: Insider Preview Build 27954 restores legacy SMBv1 file‑share connectivity over NetBIOS (NetBT) while flagging two consequential known issues for specific audiences — kernel bugchecks on some Arm64 PCs and a...
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    • canary channel pix playback smbv1 netbios windows 11
    • Replies: 0
    • Forum: Windows News

  4. KB5068221 OOB Update Fixes Office Stability in App-V on Windows 11 24H2

    Microsoft has quietly shipped an out-of-band cumulative update for Windows 11 version 24H2 — KB5068221 (OS Build 26100.6588) — that restores stability for Microsoft Office when delivered via Microsoft Application Virtualization (App‑V) while also carrying forward September’s security rollup and...

  5. Windows 11 24H2 KB5068221: App-V Office Fix and SMBv1 Workaround

    Microsoft quietly shipped an out‑of‑band cumulative update for Windows 11 version 24H2 on September 22, 2025 — KB5068221 (OS Build 26100.6588) — to resolve a targeted compatibility failure that caused Microsoft Office to misbehave when delivered via Microsoft Application Virtualization (App‑V)...

  6. Windows 11 24H2 OOB KB5068221: App V Office fix and SMBv1 NetBIOS workaround

    Microsoft pushed an unscheduled, out‑of‑band cumulative update to Windows 11 version 24H2 to address a high‑impact compatibility regression affecting virtualized Office deployments — but the patch also reiterates a known SMBv1 connectivity caveat administrators must account for before broad...
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    • app v office app-v appv compatibility copilot updates kb5068221 office office compatibility office virtualization smbv1 smbv1 netbios virtualization windows 11 windows 11 24h2
    • Replies: 5
    • Forum: Windows News

  7. Windows 11 24H2 Out of Band KB5068221: App V Fix, AI Updates, Secure Boot Reminder

    Microsoft released an out‑of‑band cumulative update for Windows 11 version 24H2 on September 22, 2025 — KB5068221 (OS Build 26100.6588) — that bundles quality fixes (including the fixes from the September 9, 2025 security rollup), updates several AI components, and quietly re‑emphasizes the...
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    • app-v appv virtualization copilot cumulative update out-of-band secure boot smb smbv1 netbios windows 11
    • Replies: 2
    • Forum: Windows News

  8. Windows 11 September 2025 Update Regressions: DRM EVR, SMBv1, PSDirect

    Microsoft has confirmed that the Windows 11 September 2025 cumulative update (KB5065426) — and an August optional preview (KB5064081) that preceded it — introduced a cluster of regressions that can break DRM-protected playback on certain legacy players, interfere with file sharing over SMBv1...
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    • drm playback powershell smbv1 netbios windows 11 updates
    • Replies: 0
    • Forum: Windows News