Cannot Save Files to Desktop and Error “File not found” in Windows 10

unauthorized changes blocked - controlled folder access

When you try to save a file on the desktop or the documents folder on your Windows 10 computer, it may show the “File not found” error message. Here is the full error message verbatim:

Save as C:\Users\Ramesh\Desktop\filename.txt
File not found.
Check the file name and try again.

.. with the “Unauthorized changes blocked” error in the Notification area and the Action Center.

unauthorized changes blocked - controlled folder access

For each error, an action center notification along with an event log entry is created.

unauthorized changes blocked - controlled folder access - action center
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How to Configure Controlled Folder Access to Stop “Unauthorized changes blocked” Notifications

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Windows 10 Fall Creators Update adds a beneficial security feature named Controlled folder access, which is part of the Windows Defender Exploit Guard. You may have noticed the Unauthorized changes blocked notifications. Windows Defender’s Controlled folder access feature is the one behind those notifications. Controlled folder access helps you protect valuable data from malicious programs, such as ransomware.

This article explains how to configure CFA and prevent Unauthorized changes blocked notifications when running a program.

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