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Office Apps Crashing

Fix Microsoft Project Closing Open Files When Laptop Is Locked

Maira MehtabMaira Mehtab Sep 20, 2026 869 views

Question details

Users are experiencing an issue where Microsoft Project unexpectedly closes all active files when the Windows laptop goes into lock mode or is manually locked.

Product
Microsoft Project
Device & OS
Windows
Scenario
Locking the Windows computer screen while Microsoft Project files are open and active.
Observed behavior
Microsoft Project automatically shuts down and closes the open files, which may lead to the loss of unsaved work.
Before you start

Manually save all your active Project files and note down your current Microsoft Office version details before modifying application settings or running a repair.

Solution 1

Temporarily Turn Off AutoSave Settings

Disabling AutoSave temporarily helps determine if background automatic saving processes are triggering the crash when Windows locks.

In some instances, the interruption of an automated background save process by the Windows lock screen can cause Microsoft Project to forcefully close.

1
Open Save Options

Launch Microsoft Project, click on the 'File' tab in the top-left corner, and select 'Options' at the bottom of the menu. Navigate to the 'Save' tab.

2
Disable AutoSave

Locate the AutoSave settings and uncheck the box for automatic saving. Click 'OK' to apply the changes.

3
Test the Lock Screen

Leave a test project file open and press the Windows Key + L to lock your laptop. Log back in to see if the application remained open.

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Frequently Asked Questions

Does locking the Windows screen normally force Office apps to close?

No, locking your Windows screen (using Windows Key + L) simply secures your active session. If Microsoft Project or other applications close during this process, it indicates an application crash or a specific configuration conflict.

Will I lose my data if MS Project closes when the computer locks?

Yes, if your file was not saved manually before the laptop locked and AutoSave did not trigger in time, you may lose unsaved changes. It is highly recommended to save your work before stepping away from your desk.

Why does Online Repair take longer than Quick Repair?

Online Repair downloads fresh installation files directly from Microsoft's servers to completely replace corrupted application files, which requires an active internet connection and more time. Quick Repair only attempts to fix local files without downloading new data.

Is this unexpected closing issue specific to Project Pro 2016?

While similar behavior has been widely reported by users with Project Pro 2016, bugs related to screen locking, power management, and background saving can potentially affect other versions of Microsoft Project depending on recent Windows updates.