Unknown Error Trying to Lock File: 3 Ways to Open the Files

Corrupt system files may be responsible for this error

4 min. read

Updated onOctober 4, 2023

updated onOctober 4, 2023

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Key notes

Some of our readers report encountering anUnknown error trying to lock a filewhen opening a file in Excel from SharePoint. Therefore, we’ll examine ways to troubleshoot this problem in this guide.

Alternatively, you can read our guide abouthow to fix SharePoint documents that won’t openin the application.

What causes an unknown error trying to lock file?

TheUnknown error trying to lock a filecan occur for different reasons. Hence, the reason below is the specific factors causing this error.

The causes above vary depending on the circumstances. Nonetheless, we will discuss the steps to resolve the error and open the files.

How can I fix an unknown error trying to lock the file?

Try the following preliminary checks to fix the file-locking error:

You should proceed with the advanced steps below if the error persists.

1. Create a network location via Registry Editor

The Registry Editor creates a Network Location for troubleshooting the SharePoint network. Read abouthow to fix a corrupt registry on Windows.

2. Clear browser cache and cookies

Clearing the browser cache and cookies will remove all pre-store data and refresh the website. Check our guide abouthow to clear the computer cachein Windows 11.

3. Add SharePoint as an exception in Firewall settings

Allowing SharePoint as an exception in Windows Firewall prevents the firewall from checking or blocking its processes.

In addition, read our guide onhow to fix these files that cannot be openederror messages. Also, do not hesitate to checkhow to open SharePoint in File Explorer.

Should you have further questions or suggestions, kindly drop them in the comments section.

Unknown Error Trying to Lock File: 3 Ways to Open the Files#

What causes an unknown error trying to lock file?#

How can I fix an unknown error trying to lock the file?#

1. Create a network location via Registry Editor#

2. Clear browser cache and cookies#

3. Add SharePoint as an exception in Firewall settings#