Hi in Windows 10 the snap windows feature (Settings -> Multi-Tasking -> Snap Windows) switches off when inteset multi application is activated / enabled.

With Inteset disabled / not activated the 'Snap Windows' features stay enabled and work ok but once we set the lockdown protection it switches this feature off.

We dont have 'No system keys' ticked

Please follow the instructions found here to install the latest "hotfix". Also, please download the latest Administrator Guide and review the Hidden Secure Lockdown Features > Enable Multi-tasking Snap option.