Microsoft is making some interesting security-related changes to Windows 10 with the next Fall Creators Update, expected to debut in September. Windows 10 testers can now access a preview of the changes that include a new controlled folder access feature. It’s designed to only allow specific apps to access and read / write to a folder. If enabled, the default list prevents apps from accessing the desktop, pictures, movies, and documents folders.

“Controlled folder access monitors the changes that apps make to files in certain protected folders,” explains Dona Sarkar, head of Microsoft’s Windows Insiders program. “If an app attempts to make a change to these files, and the app is blacklisted by the feature, you’ll get a notification about the attempt.”

The new controlled folder feature is designed to protect against viruses and ransomware from locking machines out of certain folders. Ransomware has hit the headlines recently as WannaCry and Petya wreak havoc on older Windows machines worldwide. Microsoft is also including exploit protection into its Windows Defender software in Windows 10, which should help prevent viruses and malware from exploiting vulnerabilities in the first place.