Ransomware encrypts your important files and documents with a known or custom RSA algorithm. As mentioned above, they ask for a sum of money in exchange for the key. Microsoft aims to nip the issue in the bud by blocking access to the file systems.
Going by the name of Controlled folder access, this feature essentially prevents unauthorized access to the common folders. This means that apps, scripts, DLLs and executable files won't be able to access unless you give them explicit permission.
Whenever an unauthorized app tries to have access to the protected folders, you're notified via a small notification window.
The good news is that the process is a tad customizable. You can add your own set of folders to the Controlled folder list or allow the trusted apps to access these folders.
Having done that, click on the link for Protected folders. By default, most of the common folders like Desktop, Pictures, and Documents should be already listed.
However, if you wish to, you can add folders that you deem important.
Step 3: Add Your Trusted Apps
The next step is to designate a few apps to the trusted apps list. Click on the Allow an app through Controlled folder access and add the exe file of the programs. That's it! The set up is complete.
Do keep in mind that this process will block every single unauthorized access. Though the Windows Defender Exploit Guard makes work a bit difficult initially, with proper whitelisting, it'll eventually become seamless.
Plus, its integration with third-party antivirus programs makes it even better.
Customizing Windows Defender Notifications
If you find the Windows Defender notifications too annoying, we'd recommend customizing them through the Activity Center.
Microsoft has chosen the most common of all places to place ads and suggestions – the Windows Start menu. While it does help you discover some amazing products, most of the times it's plain annoying.
Thankfully, the makers included a way to block these. Navigate to Settings > Personalization > Start and toggle the Occasionally show suggestions in Start switch off.
What's more, if you'd like to keep the Start menu clean of all the recent apps or most used apps, this menu lets you do that as well. Nifty, right?
Keep Your PC Safe
Though the Windows Defender Exploit Guard is an effective way to deal with malware attacks, it's always advisable to keep a backup of all your important stuff on a regular basis. A proper backup also acts as the perfect fall-back plan during system crashes.
Other than that, the usual rules apply — make sure not to click on any suspicious emails, howsoever eye-catching the subject is. Plus, enable the option to display file extensions so that you see the full picture of a file before you hit the click button.