You can allow users to only use apps from the Store on the Windows 10 Creators Update, and in this guide, we show you how to do it.

To block third-party app installations in Windows 11/10, you can go through the above-mentioned steps. You need to open Windows Settings and go to Apps > Apps & features.

Windows 10 'Cloud' has an interesting block forcing users to use the Windows Store when downloading programs, but that block as already been bypassed.