Unsaved files

Question

What will happen to pc W/6 programs open W/unsaved files, If power goes out?

Answer 1

Hello,

If the power goes out, Windows itself cannot keep any unsaved data in memory.

When the PC loses power, all programs are forced to close immediately, and only the data that was already written to disk remains.

After the power returns, Windows will start normally, but any unsaved work from each program will be lost unless the app has its own recovery feature.

Sudden power loss interrupts the write operation, and the affected sectors may contain incomplete data.

When the power comes back, any file that was being written at the moment of the outage may be corrupted or unreadable.

This is the normal behavior of Windows during a sudden power loss.

Answer 2

If the power goes out while six programs have unsaved files open, anything not yet saved to disk can be lost. What happens depends on each app’s protection features:

1. If the apps use AutoSave (with files in OneDrive/SharePoint)
   • Changes are continuously saved as you work.
   • After power is restored and the PC restarts, files typically reopen with most or all recent changes preserved.
2. If the apps use AutoRecover (but not continuous AutoSave)
   • The app periodically writes recovery copies in the background.
   • When Windows restarts and the app is opened again, a Document Recovery or similar pane may appear listing recovered versions.
   • Any work done after the last AutoRecover interval can be lost. For example, if AutoRecover is set to 10 minutes, up to the last 9 minutes of work may be missing.
3. If neither AutoSave nor AutoRecover is effectively configured
   • Unsaved changes in memory are lost when power fails.
   • Only the last manually saved version of each file remains.

To reduce future data loss risk:

• Store files in OneDrive or SharePoint and turn on AutoSave in Office apps.
• Enable and tune AutoRecover:
  1. In the Office app, select File > Options > Save.
  2. Ensure Save AutoRecover information every x minutes is checked and set a small interval (for example, 5–10 minutes).
  3. Ensure Keep the last autorecovered version if I close without saving is checked.
• Save frequently with Ctrl+S even when AutoRecover is enabled.

If a power outage has already occurred, reopen each Office app. If AutoRecover was active, a Document Recovery pane should appear where available; select the most recent version of each file and save it immediately.

---

References:

• Help protect your files in case of a crash
• Video: Set document recovery options
• Save your files
• Video: Recover Office files
• Recover your PowerPoint files
• Recover your Word files and documents
• Learn about Microsoft Purview Data Loss Prevention just-in-time protection