PROTECT YOUR SYSTEM FROM RANSOMWARE from Microsoft
As always, if you have important files to keep, back them up as often as needed on DVDs, Flash Drives or back-upn drives and keep them in a safe place. Also if you are using Windows 10, 11, 12 etc, you can make an image of your entire C drive onto a back-upm drive. We do ours every year. NEVER LEAVE YOUR BACK-UP DRIVES, USB DRIVES ETC plugged into your system when you are not using them. If your system gets a virus or randsomeware, it can infect and lock those drives were you can't use them!!
Here's an article from Microsoft:
And here's their instructions:
Controlled folder access- We are protecting the whole C drive, not just folders.
Controlled folder access designates specific folders which only trusted apps are allowed to access. This prevents the contents of the folders from being changed, or encrypted, by malware such as ransomware.
Enable controlled folder access by turning it on with the toggle. By default key folders such as Windows system folders, your default documents and pictures folders, and others are automatically protected.
To add protected folders:
You can add additional apps to the trusted list by selecting Allow an app through Controlled folder access then Add an allowed app.
Caution: Be thoughtful about which apps you add here; any added apps will be able to access the files in the protected folders and if that app gets compromised the data in those folders could be at risk.
Additionally, if you see an App is blocked message when you try to use a familiar app, you can simply unblock the app. Here's how:
Note: If you try to save a file to a folder and the folder is blocked, that means the app you’re using is blocked from saving to that location. If that happens, save the file to another location on your device. Then use the previous steps to unblock the app, and you’ll be able to save the files to your desired location.
For more details about controlled folder access see Protect important folders with controlled folder access.
Ransomware data recovery
OneDrive has built-in ransomware detection and recovery tools. If you're signed into an account with OneDrive (Consumer or Business) You can access them through the OneDrive interface or here. Select View files and you can use OneDrive's Files restore capability to restore any pre-attack versions of the files that may be there.
For more details see Ransomware detection and recovering your files.