Open the Windows Defender Security Center by either clicking the Windows Defender icon in the System Tray, or by going to Settings -> Update & Security -> Windows Defender and clicking Open Windows Defender Security Center.Click here for instructions.įollow the steps below to turn off Controlled folder access. The second way to resolve this is to allow Canon MF Scan Utility to work through the Controlled folder access feature of Windows Defender. The first way to resolve this is to turn off Controlled folder access in Windows 10. There are two ways that this issue can be resolved. If this is enabled, it will prevent you from being able to scan with MF Scan Utility. This may be caused by a setting in Windows Defender called Controlled folder access. If you receive an error similar to this when attempting to scan with the MF Scan Utility: