You can lock your Windows 10 remotely, and here we show you how

[Windows Central]

If you have lost your laptop or had it stolen while being logged in, you can use this guide to use your Microsoft account to find and lock it remotely.
Alongside the long list of security features, such as built-in antivirus, anti-ransomware, and firewall, Windows 10 also includes "Find my device," which is a feature that allows you to locate and lock your computer in case it's lost or stolen.
If your desktop, laptop, or tablet is lost or stolen from your house, work, or a public place, even if "Find my device" isn't enabled, you can use your Microsoft account online to quickly log out any active users remotely with the ability to change the password and track down its physical location.

Full story from the WindowsCentral blog...