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uk Technology & digital loss file locked by another session • document locked for editing • locked by another user • cannot find open document • word says locked for editing • excel says locked for editing • powerpoint locked for editing • office file locked error • onedrive file locked • sharepoint file locked • network drive file locked • locked read only message • temporary lock file tilde dollar • locked after crash • file in use but not open • ghost session holding lock • mac file locked office • windows process locking file • unable to edit shared document

What to do if…
a document says it is locked by another session and you cannot find where it is open

Short answer

Don’t force changes yet: first protect your work by opening the file read-only (or making a copy), then close any hidden sessions and identify what’s holding the lock before you remove anything.

Do not do these things

  • Don’t delete files you don’t recognise until you’ve made a backup copy of the document.
  • Don’t keep clicking “try again” on OneDrive/SharePoint/network storage — it can create conflict copies.
  • Don’t hard-power off while an app is saving; that can corrupt the file.
  • Don’t assume it’s safe to “unlock” a shared document — someone else may genuinely be editing it.
  • Don’t install unknown “unlocker” utilities (especially on a work device).

What to do now

  1. Protect your work first (30 seconds).

    • If offered Read-Only, choose it.
    • Immediately Save As a new name (e.g., filename - copy - 2026-03-08) somewhere local (Desktop/Documents) so you can keep working without touching the locked original.

  2. Check the usual “other session” places (2 minutes).

    • Look for the same file open on: another laptop/PC, your phone/tablet, Office on the web, a browser tab, or a remote desktop session.
    • Fully quit the app (not just close the window). If needed, use Task Manager (Windows) or Force Quit (Mac) to close a stuck Office app.

  3. If it’s shared storage, confirm nobody else is editing.

    • If it’s on a team share/SharePoint/OneDrive, message the team/channel: “Is anyone editing X right now?”
    • If it’s a work system and you can’t confirm, contact your IT helpdesk before you try to remove locks on shared folders.

  4. If Word/Excel/PowerPoint left an “owner” lock file behind, remove it safely (only after steps 1–3).

    • In the same folder as the document, look for a small hidden file starting with ~$ and a similar name to your document. (You may need to turn on “show hidden items/hidden files”.)
    • Safe sequence:
      1. Confirm nobody is editing the file.
      2. Make sure Office apps are fully closed everywhere.
      3. Delete only the ~$… owner/lock file.
      4. Try opening the original again.

  5. If you’re on Windows: identify the locking process (safer than guessing).

    • Open Resource Monitor (Win + R → resmon).
    • CPU tab → Associated Handles → type part of the file name.
    • Close that program normally if possible; if it’s clearly stuck, end the process or restart the PC, then try again.

  6. If you’re on a Mac: close stuck apps using Apple’s built-in tools.

    • Use Force Quit (Option–Command–Esc) for Word/Excel/PowerPoint if it’s unresponsive.
    • Or open Activity Monitor and quit/force quit the stuck process.
    • If you’re unsure what’s safe to quit, restart the Mac instead of experimenting.

  7. If OneDrive/SharePoint sync is involved: reduce conflict risk before retrying.

    • Pause OneDrive syncing.
    • Move the file out of the synced folder to a local non-OneDrive folder (e.g., a temporary folder in Documents).
    • Resume syncing and let it settle.
    • Move the file back, then try opening it again.
    • If you see multiple conflict copies, stop and involve IT (work) before deleting or merging.

  8. If the lock message shows an unfamiliar name, treat it as a security signal.

    • Note the time, file location, and exact message.
    • Report it to your organisation’s IT/security route (many UK organisations handle this via their information security team and/or Data Protection Officer).

What can wait

  • You do not need to decide right now whether the file is corrupted or rebuild it from scratch.
  • You do not need to reinstall Office as a first response.
  • You do not need to merge competing versions until you’ve stabilised one safe editable copy.

Important reassurance

This error is very often caused by a leftover background session, a temporary owner file after a crash, or a sync delay — it usually doesn’t mean your document is gone. Making a copy first gives you breathing room.

Scope note

This guide covers first steps to regain access and avoid accidental corruption. If the lock keeps returning on shared storage, the next stage is checking permissions, versioning/checkout settings, and server-side locks with IT.

Important note

This is general information, not legal or professional IT advice. If the file contains confidential work or personal data, follow your organisation’s policies and involve your IT/security team rather than experimenting on the only copy.

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