Fix the Microsoft Access "Could Not Lock File" Error After an Update
Question details
Users need to resolve a file locking error in Microsoft Access that prevents normal operations on shared databases following a recent software update.
- Product
- Microsoft Access
- Device & OS
- not provided
- Scenario
- Opening or interacting with a shared database in Microsoft Access after the December 14, 2021 update or similar recent patches.
- Observed behavior
- The application displays a "Could not lock file" error message, which disrupts daily data collection and database management workflows.
Before making changes to your Office update settings or Group Policy, ensure you have administrative privileges on your computer or contact your IT department to authorize the rollback.
Roll Back the Office Update and Set a Target Build
Revert Microsoft Office to a previous, stable build and use Group Policy to prevent it from automatically updating to the problematic version.
Rolling back the update is the most effective way to restore database functionality while Microsoft develops a permanent patch.
By setting a target version via Group Policy, your organization can keep automatic updates enabled for security purposes without receiving the specific build that triggers the lock file error.
Reach out to your IT department, explain the "Could not lock file" issue, and request a rollback of Microsoft 365 Apps to a version prior to the problematic update.
Have your IT administrator open the Group Policy Editor and navigate to the update settings for Microsoft 365 Apps to specify a 'Target Version'.
Enter the version number of the stable build. This ensures that automatic updates remain active but will not exceed the approved, functioning version of Microsoft Access.
Temporarily Disable Automatic Office Updates
Manually turn off Office updates to prevent the buggy patch from installing on unaffected machines until a permanent fix is released.
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Frequently Asked Questions
What causes the 'Could not lock file' error in Microsoft Access?
This error is typically caused by a bug introduced in a specific Microsoft Office update (such as the December 14, 2021 patch). The update interferes with how Access manages file locking and permissions in shared network databases.
Will disabling automatic Office updates put my computer at risk?
Temporarily disabling automatic updates will stop both feature and security patches for Microsoft Office. It is recommended only as a short-term workaround. Setting a target build version via Group Policy is a much safer alternative.
How do I report this Access bug to Microsoft?
You can report the bug directly within Access by clicking 'File', selecting 'Feedback', and choosing 'Send a Frown'. You can also ask your IT administrator to open an official support ticket through the Microsoft 365 Admin Center.
